Hello 👋, could anyone please recommend biology, chemistry and physics preparation books? I'm still new to this 😁

Hey guys who has book that contains formulas and prezparation materials for cent-s in physics ,maths and logic . Please send what you have in the comments

How can I take preparation for the CEnT-S exam?? Is there any resources on internet??

Is there any courses or books??

I need help :/

Hello I'm preparing for cents test but I can't find much material to practice If any of u have practice material and can share i would be very grateful

Not going to lie — I don’t have enough time to cover everything from long video lectures.

CEnT is on 19th Feb and my Class 12 Boards start from 20th Feb 😭

So instead of wasting time trying to watch hours of content, I used ChatGPT to cover the remaining Bio concepts in a structured and conceptual way.

And honestly, 😵‍💫😵

After my exams, I’ll definitely make deeper and more detailed notes.

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🧬 1️⃣ GENETICS – Clear and Practical

🔹 Important Terms (You MUST not confuse)

Gene → Segment of DNA coding for traitAllele → Different version of same geneGenotype → Genetic combination (AA, Aa, aa)Phenotype → Visible trait

Homozygous → AA or aaHeterozygous → Aa

Dominant → Expressed even if one copy presentRecessive → Expressed only when both copies present

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🔹 Mendel’s Law of Segregation

Each parent gives only ONE allele.

Example:

Aa × Aa

Possible combinations: AA, Aa, Aa, aa

Ratio: Genotype → 1:2:1Phenotype (if A dominant) → 3:1

They may not ask ratio directly.They may ask probability logic.

Example type: Two heterozygous parents. What % offspring recessive? Answer: 25%.

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🔹 Law of Independent Assortment (Basic Idea)

Genes for different traits are inherited independently(Only true if on different chromosomes)

No need for complex dihybrid crosses.

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🧪 2️⃣ ENZYMES (Very Important Conceptually)

Enzymes = Biological catalysts (proteins mostly)

They: • Lower activation energy• Speed up reactions• Are specific to substrate

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🔹 Lock and Key Model

Substrate fits into active site.Shape matters.

If structure changes → enzyme stops working.

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🔹 Effect of Temperature

Low temp → slow reactionOptimum temp → maximum activityHigh temp → denaturation (structure destroyed)

Denaturation = 3D structure lostActive site changes → no function

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🔹 Effect of pH

Each enzyme has optimal pH.

Example: Pepsin → acidicTrypsin → basic

Wrong pH → structure change → activity drops

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🫀 3️⃣ HUMAN PHYSIOLOGY (Functional Understanding)

No deep anatomy. Only logic.

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🔹 Muscle Types

Skeletal → voluntarySmooth → involuntaryCardiac → involuntary + intercalated discs

Characteristic property of muscle: Excitability (respond to stimulus)

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🔹 Respiratory System

Gas exchange happens in alveoli.

Oxygen diffuses because: High O₂ in lungs → low O₂ in blood

Diffusion = high concentration → low concentration

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🔹 Hemoglobin & CO₂ (Bohr Effect Basic Idea)

High CO₂ + low pH in tissues→ Hemoglobin releases oxygen

Why?Because acidic condition lowers affinity for O₂.

This is why active tissues get more oxygen.

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🔹 Circulation Flow (Very Basic)

Right side heart → lungsLeft side heart → body

Oxygenated blood: Left atrium → left ventricle → body

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🌱 4️⃣ PLANT PROCESSES (Clarify Once)

Photosynthesis

Overall idea: CO₂ + H₂O + Light → Glucose + O₂

Important trap: Oxygen comes from WATER, not CO₂.

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Cellular Respiration

Glycolysis → cytoplasmKrebs cycle → mitochondriaElectron transport chain → mitochondria

Produces ATP.

ATP is energy currency.

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🦠 5️⃣ MICROBIOLOGY DIFFERENCE

Bacteria

• Prokaryotic• No nucleus• 70S ribosome• Can reproduce independently

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Virus

• Not considered fully living• No metabolism• Needs host cell• Has DNA or RNA (not both)

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🧠 Quick Concept Check

Tell me:

1. Why does high temperature reduce enzyme activity?

2. If Aa × aa, what % offspring will show dominant trait?

3. Why does hemoglobin release O₂ in active muscles?

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🧬 1️⃣ MEMBRANE TRANSPORT (Very Important)

This is asked a lot.

🔹 Passive Transport

Moves high → low concentrationNo energy required

Types: • Simple diffusion• Facilitated diffusion• Osmosis

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Diffusion

Small non-polar molecules pass directly: O₂, CO₂

Moves down concentration gradient.

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Osmosis

Movement of water across semipermeable membrane.

Water moves: Low solute → High solute

Remember: Water follows solute.

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Facilitated Diffusion

Uses protein channelStill high → lowStill no ATP

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🔥 Active Transport

Moves: Low → High concentration

Requires ATP.

Example: Na⁺/K⁺ pump.

Exam trap: If energy is mentioned → it’s active transport.

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⚡ 2️⃣ ATP – Energy Logic

ATP = Adenosine Triphosphate

Energy stored in phosphate bonds.

ATP → ADP + Pi releases energy.

Produced in: Cellular respiration

Used for: • Muscle contraction• Active transport• Synthesis reactions

Important: Photosynthesis produces glucose. Respiration produces ATP.

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🧬 3️⃣ DNA STRUCTURE (Must be crystal clear)

Double helixAntiparallel strands: 5’ → 3’3’ → 5’

Base pairing: A = T (2 hydrogen bonds)G ≡ C (3 hydrogen bonds)

More GC → more stable DNA(because 3 bonds)

That’s why high GC content = heat resistant.

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🔥 DNA Replication (Basic Logic)

Semi-conservative.

Each new DNA: 1 old strand + 1 new strand

Occurs in S-phase of interphase.

Important: Meiosis has TWO divisionsBut DNA replication happens only ONCE.

That’s why chromosome number halves.

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🧬 4️⃣ PROTEIN SYNTHESIS

Central Dogma:

DNA → RNA → Protein

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Transcription

DNA → mRNAOccurs in nucleus

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Translation

mRNA → ProteinOccurs in ribosome

Codon = 3 nucleotidesEach codon codes 1 amino acid.

Mutation → codon change → protein change.

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🌎 5️⃣ ECOLOGY – Deeper Conceptual

Food Chain

Energy decreases at each trophic level.

Only ~10% energy transfers upward.

Why? Energy lost as heat (metabolism).

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Trophic Levels

Producers → Primary consumers → Secondary → Tertiary

If top predator removed: Lower levels increasePlant level decreases

Classic MCQ trap.

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Biomagnification

Toxins increase as you move up food chain.

Top predator accumulates most toxins.

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🧠 6️⃣ Biological Reasoning Patterns They Like

They test:

Cause → Effect

Examples:

High CO₂ → low pH → low hemoglobin affinityHigh temperature → enzyme denaturationHigh GC → more hydrogen bonds → more stabilityActive transport → requires ATP

They love chain-logic questions.

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​

Guys, many of you might not know this

If you have already booked your CEnT-S test, you can access the official simulation practice test through the Student Practice Arena.

This is not random practice.

This is the official simulation environment, same interface style as the real test.

🔗 Login here:

https://allenamento.cisiaonline.it/utenti_esterni/login_sso.php

After logging in, you can:

• Attempt a full-length simulated test

• Practice under real timer conditions

• Get your score immediately

• Understand the interface before exam day

This helps a LOT with:

✔ Time management

✔ Reducing exam anxiety

✔ Understanding question navigation

✔ Getting used to on-screen calculator (if allowed)

If you already booked your slot and haven’t tried this yet go try it today.

Don’t walk into the real exam without experiencing the interface once.

Let me know if you’ve tried it and what score you’re getting 👇

​

Bro… chemistry is officially completed.

And I’m not even joking this was literally the toughest part till now.So many concepts, so much theory, everything connected with everything.

But yeah… I finished it.😭

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🧪 How I Studied It

I used ChatGPT for this part and the chat was LONG.Like really long.

But trust me — worth it.

Every concept was explained properly: • States of matter• Physical vs chemical changes• Particle model• Mixtures and separation• Fundamental laws• Concept clarity (not just mugging up)

It helped me understand the “why” behind things instead of just memorising.

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🌐 Why I’m Not Posting All the Notes Here

The content is too big to post properly here.It would just look messy and incomplete.

So for now, I made a temporary small website where I’ll upload everything in structured format.

https://cents-chemistry.lovable.app/

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🚀 Evo CEnt Prep (Under Development)

I’m building something called Evo CEnt Prep.

Idea is simple: • All my posts• All my research• Proper topic-wise structure• Clean and organised

Right now it’s under development.After my CEnt exam, I’ll properly finish it.

https://evocentsprep.lovable.app/

if you want to connect with me on Instagram regarding if you want any service like website ,software,app,ai integration in business

my bussines id - @evodevs

my id - @ansh__3070

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📊 Progress Update

✔ Maths – Completed✔ Chemistry – Completed⏳ Physics – Starting tomorrow

We’re getting there slowly.

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🎯 19 Feb – CEnt

Exam is on 19 February.

Day 10 done ✅Chem survived. 😭🔥

Now physics tomorrow. Let’s close this properly.

I’m nervous but excited too 😭😭

Wish me all the best for 19 Feb 🍀

Let’s see how it goes.🤞✨️

​

Today I completed the full CENTS Mathematics syllabus.

All topics are covered. All handwritten notes and resources are uploaded.

Only Functions and Statistics don’t have separate handwritten notes because I used very structured resources for them — links will be shared in the comments.

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📘 Complete Mathematics Coverage

1️⃣ Algebra & Polynomials

• Factorisation

• Roots of polynomials

• Linear equations

• Quadratic equations

• Algebraic manipulation

• Identities

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2️⃣ Exponents & Logarithms

• Laws of exponents

• Laws of logarithms

• Change of base formula

• Solving exponential equations

• Solving logarithmic equations

• Converting between exponential and log form

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3️⃣ Coordinate Geometry

• Distance between two points

• Section formula

• Slope of line

• Equation of line (slope form, two-point form, intercept form)

• Distance of point from line

• Circle – standard form and general form

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4️⃣ Geometry & Mensuration

🔹 2D Shapes

• Area and perimeter of triangle

• Rectangle, square

• Circle

• Basic properties

🔹 3D Shapes

• Surface area and volume of:

Cube

Cuboid

Cylinder

Cone

Sphere

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5️⃣ Similarity & Congruency

• AA similarity

• SAS similarity

• SSS similarity

• Ratio of sides

• Basic triangle relationships

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6️⃣ Permutations & Combinations

• nPr

• nCr

• Relation between permutation and combination

• Special results

• Cases with repetition

• Basic arrangement logic

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7️⃣ Functions (Covered – Resource Based)

Although I did not create separate handwritten notes, I fully covered:

• Definition of function

• Domain and range

• One-one and onto functions

• Types of functions

• Graph interpretation

• Increasing and decreasing functions

• Understanding function notation

Everything is explained clearly in the shared resource.

Link will be in comments.

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8️⃣ Statistics (Covered – Resource Based)

I studied:

• Mean

• Median

• Mode

• Frequency distribution

• Absolute frequency

• Relative frequency

• Basic data interpretation

• Understanding grouped and ungrouped data

The full explanation resource will be shared in comments.

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📊 Final Status

Mathematics syllabus: 100% complete

Notes uploaded: Yes

Functions resource: Link in comments

Statistics resource: Link in comments

Now moving fully toward: • Physics

• Chemistry

• Reasoning

• Biology

Today I completed a major portion of the Chemistry syllabus related to Macroscopic Properties of Matter. This includes the conceptual foundation of matter, states, mixtures, and fundamental chemical laws.

📘 (Table of Contents)

1️⃣ States of Matter

• Solid • Liquid • Gas

2️⃣ Physical and Chemical Changes

3️⃣ Particle Model of Matter

4️⃣ Macroscopic Properties of Matter

• Properties of Solids • Properties of Liquids • Properties of Gases

5️⃣ Mixtures

A. Homogeneous Mixtures

B. Heterogeneous Mixtures

6️⃣ Methods of Separation of Mixtures

• Filtration • Evaporation • Distillation • Chromatography

7️⃣ Fundamental Laws of Chemistry

• Law of Conservation of Mass (Lavoisier) • Law of Definite Proportions (Proust) • Gay-Lussac’s Law of Combining Volumes • Avogadro’s Law

🌡️ STATES OF MATATTER

1️⃣ What Actually Determines the State of Matter? Three things: 1. Intermolecular force (IMF)

1. Kinetic energy of particles

2. Distance between particles

The balance between IMF and kinetic energy decides whether a substance is solid, liquid, or gas.

🧊 Solid Intermolecular force ≫ Kinetic energy Particles fixed in position Only vibrational motion possible Definite shape and volume Very low compressibility

👉 Why low compressibility?Because particles are already at minimum possible distance.

💧 Liquid Intermolecular force ≈ Kinetic energy Particles can move but remain close Definite volume No definite shape Slightly compressible

💨 Gas Kinetic energy ≫ Intermolecular force Particles move freely and randomly No fixed shape or volume Highly compressible

👉 Compressibility depends on empty space between particles.

🧠 Why does gas diffuse fastest?

Diffusion speed ∝ Particle freedom + spacingGas particles: Have high kinetic energy Have maximum spacing Experience minimal attractive forces

So they spread fastest.

🧠 Why does temperature increase cause expansion?

When temperature increases: → Kinetic energy increases→ Particles move faster→ They move further apart→ Volume increases No formulas needed for this level.

Now let’s check your clarity. Answer these conceptually (no textbook language): 1. Why are solids rigid but liquids flow?

1. If intermolecular force increases, which state becomes more likely?

🧪 2️⃣ PHYSICAL AND CHEMICAL CHANGES This topic is extremely important because CEnT-S loves conceptual differentiation questions.

🔹 What is a Physical Change? A physical change is a change where: No new substance is formed Chemical composition remains the same Usually reversible Only physical properties change (shape, size, state)

Examples: Ice melting Water boiling Cutting paper Dissolving sugar in water

In all these cases: The substance is still chemically the same. Melting ice: H₂O(s) → H₂O(l)Only state changes.

🔹 What is a Chemical Change? A chemical change is when: A new substance is formed Chemical composition changes Usually irreversible Often energy change occurs

Examples: Burning paper Rusting iron Cooking food Acid reacting with base

When paper burns: Cellulose + O₂ → CO₂ + H₂O + ash That is a new set of substances.

🧠 How to Identify in Exam? CEnT-S won’t ask definitions directly. It may give situations like: 1. Milk turning sour

1. Iron rod bending

2. Silver becoming black

3. Ice melting

You must classify.

Quick Conceptual Clues Observation Likely Type Gas formation ChemicalColor change Usually ChemicalPrecipitate formation ChemicalOnly state change PhysicalOnly shape change Physical

But careful: Color change alone is not always chemical (like dissolving KMnO₄). So always think: 👉 Has the substance’s identity changed?

🔥 Deep Concept (Important) Why is dissolving sugar a physical change? Because sugar molecules are still sugar molecules. They are just dispersed in water. No bonds inside sugar molecules break. But burning sugar? That breaks chemical bonds. That’s chemical.

Now I want you to think and answer properly: 1. Why is rusting iron considered chemical change?

1. Is dissolving salt in water physical or chemical? Explain properly — not one line.

🔥 Important Concept Here Breaking intermolecular forces → usually physicalBreaking chemical bonds and forming new substances → chemical In NaCl dissolution: The ionic lattice breaks, but no new compound forms. So it is classified as physical.

🧬 PARTICLE MODEL OF MATTER () This is the foundation of everything in macroscopic properties. You cannot see particles.But everything — solid, liquid, gas — is made of tiny particles. Now the particle model says just 4 simple things:

1️⃣ Matter is made of tiny particles Even a stone, even water, even air.They are made of extremely small particles (atoms/molecules). You cannot see them with eyes.

2️⃣ These particles are always moving Even in solids. In solid → they vibrate In liquid → they move slowly In gas → they move freely and fast

They never stop moving.

3️⃣ There is space between particles In solid → very little space In liquid → little space In gas → large space

This explains compressibility.

4️⃣ There are attractive forces between particles This force holds particles together. Strong in solid Medium in liquid Weak in gas

This explains rigidity and flow.

Now let’s connect this to real life. Why does perfume smell spread in a room? Because: Gas particles are moving randomly. They move from high concentration area to low concentration area. That movement is called diffusion.

---. Tell me this: If particles are always moving, why does a solid not change shape?

🧪 HOMOGENEOUS AND HETEROGENEOUS MIXTURES

This topic is conceptually important but not difficult. CEnT-S may give examples and ask classification.

🔹 First Understand: What is a Mixture?

A mixture is:

Two or more substances physically combined

No chemical reaction between them

Components retain their own properties

Can be separated by physical methods

Example: Sand + salt Oil + water Air

Important: In mixtures, substances are not chemically bonded.

🔵 HOMOGENEOUS MIXTURE

Also called a solution.

Properties:

Uniform composition throughout

Cannot distinguish components with naked eye

Single phase

Examples:

Salt water

Sugar solution

Air

Alcohol + water

If you take sample from top or bottom → same composition.

🟠 HETEROGENEOUS MIXTURE

Properties:

Non-uniform composition

Components visible or separate phases

More than one phase

Examples:

Oil + water

Sand in water

Soil

Ice in water

If you take sample from different places → composition differs.

🔥 Key Concept (Very Important)

Homogeneous ≠ Pure substance

Salt water is homogeneous But it is still a mixture, not a compound.

Because:

Composition can vary

It can be separated physically

Now think carefully:

Is milk homogeneous or heterogeneous?

Don’t rush. Think scientifically.

Alright. Smooth flow. Let’s continue properly.

🧪 METHODS OF SEPARATION OF MIXTURES

This is practical chemistry. Very conceptual. No deep theory needed.

Remember one rule:

👉 Since mixtures are physically combined, they can be separated by physical methods.

🔹 1️⃣ Filtration

Used when: Solid + liquid mixture and solid is insoluble.

Example: Sand + water

Sand stays on filter paper. Water passes through.

Principle: Difference in particle size.

🔹 2️⃣ Evaporation

Used when: Solid dissolved in liquid.

Example: Salt water

Water evaporates → salt remains.

Principle: Difference in volatility.

🔹 3️⃣ Distillation

Used when: Two liquids with different boiling points.

Example: Alcohol + water

Lower boiling point liquid vaporizes first.

Principle: Difference in boiling points.

🔹 4️⃣ Chromatography

Used when: Mixture of colored substances.

Example: Ink separation

Principle: Different solubility or adsorption.

🔥 Important CEnT-S Thinking

If question asks:

How will you separate:

Sand and water? → Filtration

Salt from salt water? → Evaporation

Alcohol from water? → Distillation

No advanced apparatus details needed.

Now we move to last major part of macroscopic properties:

⚖️ FUNDAMENTAL LAWS OF CHEMISTRY

This is conceptual but important.

1️⃣ Law of Conservation of Mass (Lavoisier)

Mass before reaction = Mass after reaction

Matter is neither created nor destroyed. Only rearranged.

Example: If 10 g reactants → 10 g products.

Even if gas escapes, total mass in closed system remains same.

2️⃣ Law of Definite Proportions (Proust)

A compound always contains elements in fixed ratio by mass.

Water: Always 2:1 hydrogen to oxygen (by atoms).

You cannot have H₃O or H₂O₂ and call it water.

3️⃣ Gay-Lussac’s Law (Volume Ratio)

Gases react in simple whole-number volume ratios.

Example: 2 volumes H₂ + 1 volume O₂ → 2 volumes H₂O (vapour)

4️⃣ Avogadro’s Law

Equal volumes of gases at same temperature and pressure contain equal number of molecules.

This leads to mole concept later.

Now we completed:

✔ States of matter ✔ Physical & chemical change ✔ Particle model ✔ Macroscopic properties ✔ Mixtures ✔ Separation ✔ Fundamental laws

That finishes Macroscopic Properties of Matter.

📊 Progress Update

With today’s completion:

✔ Chemistry foundational macroscopic concepts covered

✔ Strong conceptual base built

✔ Chemistry portion progressing steadily

📝 Note About These Notes

These notes are based on my personal study and understanding while preparing for CEnT-S. They are not official materials. Since there are limited official resources available, I am structuring concepts clearly for myself and others preparing. If you find: • Any conceptual error • Any missing important point • Any incorrect interpretation Please let me know. I am open to corrections. The goal is collaborative preparation.

​

(Approx. 40% Maths Syllabus Completed)

Today I focused on:

1. 2D Geometry (Area & Perimeter)

2. 3D Geometry (Mensuration – Volume & Surface Area)

3. Exponents

4. Logarithms

This was a strong conceptual day covering formulas + understanding + applications.

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Part 1 – 2D Geometry (Plane Figures)

I revised area and perimeter formulas of common shapes.

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1) Rectangle

Area = l × b

Perimeter = 2(l + b)

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2) Square

Area = a²

Perimeter = 4a

Diagonal = a√2

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3) Triangle

Area = (1/2) × base × height

For equilateral triangle:

Area = (√3/4) a²

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4) Parallelogram

Area = base × height

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5) Trapezium

Area = (1/2) (a + b) × h

Where a and b are parallel sides.

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6) Circle

Area = πr²

Circumference = 2πr

Important:

Always remember r = diameter / 2

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Concept Understanding (2D):

• Area is measured in square units

• Perimeter is linear measurement

• In MCQs, units and substitutions matter

• Diagonal and height-based questions are common

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Part 2 – 3D Geometry (Mensuration)

Covered volume and surface area formulas.

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1) Cylinder

Volume = πr²h

Curved Surface Area = 2πrh

Total Surface Area = 2πrh + 2πr²

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2) Cone

Volume = (1/3)πr²h

Curved Surface Area = πrl

Total Surface Area = πr(l + r)

Slant height:

l = √(r² + h²)

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3) Sphere

Volume = (4/3)πr³

Surface Area = 4πr²

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4) Cube

Volume = a³

Total Surface Area = 6a²

Space Diagonal = a√3

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5) Cuboid

Volume = l × b × h

Total Surface Area = 2(lb + bh + hl)

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Concept Understanding (3D):

• Volume is in cubic units

• Surface area is in square units

• Understand difference between CSA and TSA

• Visualizing the solid helps avoid mistakes

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Part 3 – Exponents

Rules revised:

a^m × a^n = a^(m+n)

a^m / a^n = a^(m−n)

(a^m)^n = a^(mn)

a^0 = 1

a^−n = 1 / a^n

Important:

Negative power means reciprocal.

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Part 4 – Logarithms

Definition:

If a^x = b

Then log_a b = x

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Log Laws

log_a (xy) = log_a x + log_a y

log_a (x/y) = log_a x − log_a y

log_a (x^n) = n log_a x

log_a 1 = 0

log_a a = 1

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Base 10 Log

log(1000) = 3

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Natural Log

ln(e) = 1

e ≈ 2.718

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Concept Understanding:

• Log converts multiplication into addition

• Useful in exponential equations

• Frequently asked in objective exams

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Progress Update

With today’s study:

Around 40% of Mathematics syllabus is now completed.

Major Areas Covered So Far:

• Algebra basics

• Polynomials

• Functions

• 2D Geometry

• 3D Geometry

• Exponents

• Logarithms

Remaining Focus:

• Probability

• Statistics

• Coordinate Geometry deeper practice

• Mixed application questions

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Honest Reflection

Today was formula-heavy but important.

Instead of just memorizing, I focused on:

• Understanding where formulas come from

• Practicing substitutions carefully

• Avoiding sign mistakes

• Strengthening basics

.

​

HOW TO PREPARE FOR THE LOGIC SECTION

Logic is the highest-weight section in CEnT-S and requires careful reading and structured thinking.

Preparation Method

1. Read every statement carefully.

2. Focus on logical structure.

3. Avoid assumptions not given in the question.

4. Practice interpreting tables and graphs.

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HIGH PRIORITY AREAS

1. Logical connectives and implications.

2. Necessary and sufficient conditions.

3. Quantifiers such as all, some, none.

4. Data interpretation from charts and tables.

5. Word-to-equation translation.

6. Percentage and ratio reasoning.

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COMMON MISTAKES IN LOGIC

1. Ignoring small keywords.

2. Misinterpreting quantifiers.

3. Adding outside assumptions.

4. Rushing long passages.

5. Overcomplicating simple reasoning.

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CEnT-S

REASONING ON TEXTS AND DATA

Exam weight: 15 questions

Time: 30 minutes

Level: Analytical reasoning and interpretation

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1. LOGIC AND DEDUCTIVE REASONING

Detailed Syllabus

1. Logical connectives

Negation

Conjunction

Disjunction

Implication

1. Quantifiers

All

Every

Each

None

At least

1. Determining when a proposition is true or false

2. Recognising compatibility and incompatibility between propositions

3. Logical equivalence

4. Deduction of consequences from one or more propositions

5. Identifying contradictions

6. Negating a given proposition

7. Identifying counterexamples

8. Necessary condition

9. Sufficient condition

10. Necessary and sufficient condition

11. Set representation of logical relationships

12. Basic set operations

Union

Intersection

Difference

Complement

YouTube Search Term

Logical reasoning connectives quantifiers sets basics one shot

Important Notes

Careful reading is essential.

Do not assume information not explicitly stated.

Small wording differences can completely change meaning.

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1. INTERPRETATION AND MANIPULATION OF DATA

Detailed Syllabus

1. Understanding structured texts

2. Moving between different types of representation

3. Extracting numerical information from text

4. Interpreting tables

5. Interpreting histograms

6. Interpreting pie charts

7. Interpreting line graphs

8. Drawing conclusions from data

9. Determining whether a statement is supported by data

10. Sorting data using different criteria

11. Recognising how information is derived from a dataset

YouTube Search Term

Data interpretation tables charts graphs reasoning basics

Important Notes

Base answers only on provided data.

Check percentages, totals, and units carefully.

Avoid personal assumptions.

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1. PROBLEM SOLVING AND BASIC MATHEMATICAL LANGUAGE

Detailed Syllabus

1. Understanding problem statements with diagrams or tables

2. Representing information using tables, sets, or diagrams

3. Performing simple calculations

4. Comparing and ordering numbers

5. Working with percentages

6. Working with ratios

7. Understanding proportional relationships

8. Using arithmetic mean

9. Translating verbal relationships into equations

10. Extracting information from formulas

11. Evaluating whether a mathematical result is valid in a real context

YouTube Search Term

Problem solving mathematical reasoning basics one shot

Important Notes

Understand the situation before calculating.

Many questions combine logical reasoning with simple mathematics.

Accuracy is more important than speed.

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END OF REASONING ON TEXTS AND DATA SYLLABUS

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QUICK REVISION CHECKLIST

Before the exam, confirm you can:

1. Identify contradictions.

2. Negate statements correctly.

3. Interpret graphs accurately.

4. Translate text into equations.

5. Compare ratios and percentages confidently.

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TIME MANAGEMENT FOR LOGIC

Total questions: 15

Total time: 30 minutes

Recommended pace:

1. Spend no more than 2 minutes per question.

2. Skip and return if unsure.

3. Focus on accuracy over guessing.

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​

HOW TO STUDY BIOLOGY FOR CEnT-S

Biology in CEnT-S focuses on conceptual clarity and understanding relationships between structure and function.

Study Approach

1. Read each topic carefully before memorising.

2. Focus on comparisons such as plant vs animal cells and mitosis vs meiosis.

3. Use simple diagrams while revising.

4. Revise definitions clearly and precisely.

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HIGH PRIORITY AREAS

1. Organelle functions.

2. Differences between prokaryotic and eukaryotic cells.

3. Differences between mitosis and meiosis.

4. Mendelian inheritance basics.

5. Photosynthesis fundamentals.

6. Ecological relationships.

7. Human body systems and their functions.

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COMMON MISTAKES IN BIOLOGY

1. Memorising without understanding.

2. Confusing similar terms.

3. Mixing stages of cell division.

4. Ignoring structure–function connections.

5. Studying advanced genetics beyond syllabus.

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Exam weight: 10 questions

Time: 20 minutes

Level: Conceptual understanding and application

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◆ 1. BIOLOGICAL MOLECULES

Detailed Syllabus

➤ Biological properties of water

➤ Hydrophilic and hydrophobic molecules

➤ Carbohydrates

➤ Lipids

➤ Proteins (structure levels: primary, secondary, tertiary, quaternary)

➤ Nucleic acids (DNA and RNA)

➤ Monomers and polymers

➤ Relationship between structure and biological function

YouTube Search Term

Biological molecules biomolecules complete basics one shot

✓ Important Notes

Focus on structure–function relationships

Understand differences between major biomolecules

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◆ 2. CELL BIOLOGY

Detailed Syllabus

➤ Prokaryotic vs eukaryotic cells

➤ Plant vs animal cells

➤ Plasma membrane structure and function

➤ Nucleus

➤ Ribosomes

➤ Endoplasmic reticulum

➤ Golgi apparatus

➤ Lysosomes

➤ Mitochondria

➤ Cytoskeleton

➤ Cell wall

➤ Chloroplasts and plastids

➤ Vacuoles

YouTube Search Term

Cell biology prokaryotic eukaryotic plant animal cells basics

✓ Important Notes

Know organelle functions clearly

Comparison-based questions are common

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◆ 3. CELL CYCLE, DIVISION AND INHERITANCE

Detailed Syllabus

➤ Structure of genetic material

➤ DNA replication (basic idea)

➤ Transcription and translation (basic understanding)

➤ Cell cycle phases

➤ Mitosis

➤ Meiosis

➤ Mendelian inheritance

➤ Dominant and recessive traits

➤ Basic genetic crosses

YouTube Search Term

Cell cycle mitosis meiosis mendelian genetics basics

✓ Important Notes

Understand differences between mitosis and meiosis

Basic inheritance logic is frequently tested

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◆ 4. PLANT BIOLOGY AND ECOLOGY

Detailed Syllabus

➤ Structure and function of root, stem, leaf

➤ Flower, fruit and seed

➤ Photosynthesis

➤ Energy flow in ecosystems

➤ Food chains and food webs

➤ Biotic interactions

Competition

Predation

Parasitism

Mutualism

Commensalism

YouTube Search Term

Plant biology photosynthesis ecology basics one shot

✓ Important Notes

Energy flow direction is important

Know types of ecological relationships

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◆ 5. ANIMAL ANATOMY AND PHYSIOLOGY

Detailed Syllabus

➤ Epithelial tissue

➤ Connective tissue

➤ Muscular tissue

➤ Nervous tissue

➤ Musculoskeletal system

➤ Digestive system

➤ Respiratory system

➤ Circulatory system

➤ Excretory system

➤ Nervous system

YouTube Search Term

Human anatomy physiology tissues and systems basics

✓ Important Notes

Understand structure and function connections

System-level questions are conceptual

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END OF CEnT-S BIOLOGY SYLLABUS

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QUICK REVISION CHECKLIST

Before the exam, confirm you can:

1. Identify major biomolecules and their functions.

2. Compare different cell types.

3. Explain mitosis and meiosis clearly.

4. Solve simple genetic crosses.

5. Identify ecological interactions.

6. Match organ systems with their functions.

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TIME MANAGEMENT FOR BIOLOGY

Total questions: 10Total time: 20 minutes

Recommended pace:

1. Spend around 1.5 to 2 minutes per question.

2. Read terminology carefully before answering.

3. Avoid rushing through concept-based questions.

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FINAL NOTE

This guide is intended to support efficient and focused preparation for the CEnT-S Chemistry [section.It](http://section.it/) does not replace official CISIA documentation or university admission notices.

Students should always verify requirements directly from official sources.

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ABOUT THIS CEnT-S CHEMISTRY GUIDE

The chemistry syllabus presented in this guide is based on the official CEnT-S syllabus published by CISIA.All core topics correspond to the original syllabus without addition or removal of subject matter.

The syllabus has been reorganised and expanded only to improve clarity, structure, and ease of independent study.

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ABOUT THE YOUTUBE SEARCH TERMS

The YouTube search terms included in this guide are provided purely as study assistance.They are not official recommendations and are meant to help students quickly find explanatory videos.

Students may use any educational platform or resource that aligns with their learning style.

Exam weight: 10 questionsTime: 20 minutesLevel: Conceptual foundation with basic calculations

1. MACROSCOPIC PROPERTIES OF MATTER

Detailed Syllabus

States of matter: solid, liquid, gas

Physical and chemical changes

Particle model of matter

Macroscopic properties of gases, liquids, and solids

Homogeneous and heterogeneous mixtures

Methods of separation of mixtures

Fundamental laws of chemistryLaw of conservation of mass (Lavoisier)Law of definite proportions (Proust)Gay-Lussac’s lawAvogadro’s law

YouTube Search Term

States of matter and laws of chemistry basics one shot

Important Notes

Focus on identifying physical vs chemical changes

Understand laws conceptually, not historically

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1. MICROSCOPIC PROPERTIES OF MATTER AND ATOMIC STRUCTURE

Detailed Syllabus

Structure of the atom

Subatomic particles

Atomic number and mass number

Isotopes

Electronic configuration

Valence electrons

Lewis structures (electron dot structures)

Chemical formulas

Ions and compounds

Relative atomic mass and molecular mass

Types of chemical bondsIonic bondCovalent bondMetallic bond

Bond polarity

Intermolecular forces

Hydrogen bonding

Molecular geometry (VSEPR theory)

Hybridisation (basic idea)

YouTube Search Term

Atomic structure chemical bonding VSEPR hybridisation basics

Important Notes

Lewis structures are frequently tested

Bond type identification is important

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1. PERIODIC TABLE AND PERIODIC TRENDS

Detailed Syllabus

Structure of the periodic table

Periods and groups

Relationship between electronic configuration and position

Atomic models (basic idea)

Quantum numbers (introductory level)

Periodic trendsAtomic radiusElectronegativityIonisation energy

Prediction of chemical properties using periodic trends

YouTube Search Term

Periodic table trends and atomic structure chemistry basics

Important Notes

Trend-based questions are common

Focus on comparison, not memorisation of values

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1. CHEMICAL REACTIONS AND STOICHIOMETRY

Detailed Syllabus

Writing chemical equations

Balancing chemical equations

Concept of mole

Avogadro’s constant

Mass–mole conversions

Limiting reagent (basic idea)

Theoretical yield

Relationship between mass and moles

Units of concentrationMolarityMass concentrationPercentage composition

YouTube Search Term

Stoichiometry mole concept and balancing equations one shot

Important Notes

Calculations are straightforward

Correct units are essential

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1. THERMODYNAMICS AND CHEMICAL KINETICS

Detailed Syllabus

Endothermic and exothermic reactions

Internal energy

Enthalpy

Entropy (conceptual)

Gibbs free energy (qualitative)

Reaction spontaneity

Ideal gas laws

Partial pressure

Chemical equilibrium

Equilibrium constant

Reaction quotient

Activation energy

Catalysis

Reaction rate

Effect of temperature and pressure on reaction rate

YouTube Search Term

Chemical thermodynamics equilibrium kinetics basics one shot

Important Notes

Most questions are conceptual

Equilibrium direction questions are common

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1. COMPOUNDS AND SOLUTIONS

Detailed Syllabus

Chemical formulas and nomenclatureIUPAC nomenclatureTraditional nomenclature

Properties of inorganic compounds

Electrolytes and non-electrolytes

Solubility

Properties of solutions

Electrical conductivity of solutions

Colligative properties (basic idea)

Chemical properties of metals

YouTube Search Term

Chemical nomenclature solutions electrolytes chemistry basics

Important Notes

Naming rules are important

Identify electrolyte vs non-electrolyte

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1. ACIDS AND BASES

Detailed Syllabus

Definitions of acids and bases

Acid–base reactions

Strong and weak acids and bases

pH scale

pH calculations (basic)

pH indicators

Neutralisation reactions

Salt formation

pH of salt solutions

Buffer solutions (conceptual understanding)

YouTube Search Term

Acids bases pH buffers chemistry basics one shot

Important Notes

pH questions are usually simple

Conceptual understanding is sufficient

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1. OXIDATION AND REDUCTION (REDOX REACTIONS)

Detailed Syllabus

Oxidation and reduction concepts

Oxidation number

Identification of oxidising and reducing agents

Redox reactions

Redox potential scale (introductory)

Balancing simple redox reactions

YouTube Search Term

Redox reactions oxidation number balancing basics

Important Notes

Oxidation number calculation is key

Balancing is basic, not advanced

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1. ORGANIC CHEMISTRY

Detailed Syllabus

Carbon hybridisation

Structure of simple organic compounds

Combustion reactions

Isomerism (basic idea)

Functional groups

Nomenclature and properties ofAlkanesAlkenesAlkynesCycloalkanesBenzene and aromatic compoundsAlcoholsAldehydesKetonesEthersEstersCarboxylic acids

YouTube Search Term

Organic chemistry functional groups nomenclature basics one shot

Important Notes

Functional group identification is important

No reaction mechanisms required

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1. APPLIED CHEMISTRY AND EVERYDAY CHEMISTRY

Detailed Syllabus

Measurements and units in chemistry

Uncertainty in experimental data

Chemical reactions in daily life

Reading and understanding product labels

Environmental chemistryAcid rainGreenhouse effectSmog

Chemical safety rules

YouTube Search Term

Applied chemistry environmental chemistry basics one shot

Important Notes

Questions are application-based

Common-sense reasoning helps

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END OF CEnT-S CHEMISTRY SYLLABUS

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STUDY STRATEGY FOR CEnT-S CHEMISTRY

CEnT-S Chemistry focuses on conceptual understanding with basic calculations.The exam does not require advanced derivations or complex numerical problem solving.

Recommended approach

1. Study concepts before memorising formulas.

2. Focus on understanding trends, definitions, and applications.

3. Revise units, symbols, and nomenclature regularly.

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IMPORTANT AREAS TO PRIORITISE

1. Atomic structure and bonding

2. Periodic trends

3. Stoichiometry and mole concept

4. Acids, bases, and pH

5. Redox reactions

6. Organic functional groups

7. Environmental and applied chemistry

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COMMON MISTAKES TO AVOID

1. Memorising reactions without understanding

2. Ignoring units and chemical symbols

3. Overstudying advanced organic mechanisms

4. Spending excessive time on complex calculations

5. Guessing answers without checking concepts

Negative marking makes accuracy essential.

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FINAL REVISION CHECKLIST

Before the exam, ensure that you can confidently do the following:

1. Identify bond types and molecular shapes

2. Use periodic trends to compare elements

3. Apply the mole concept correctly

4. Calculate simple pH values

5. Identify oxidation and reduction processes

6. Recognise organic functional groups

7. Interpret chemistry in everyday contexts

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FINAL NOTE

This guide is intended to support efficient and focused preparation for the CEnT-S Chemistry section.It does not replace official CISIA documentation or university admission notices.

Students should always verify requirements directly from official sources.

---