What's happening? Electrons orbit at fixed energy levels. Eₙ = -13.6/n² eV. Higher n = larger orbit, less negative energy. Electron jumps between levels by absorbing/emitting photons.

⚖️ Le Chatelier's Equilibrium

Equilibrium

Pressure 1 atm

Temperature 300 K

What's happening? N₂ + 3H₂ ⇌ 2NH₃ (exothermic). Increasing pressure shifts right (fewer moles). Increasing temperature shifts left (endothermic direction).

🧪 pH Scale

Acids/Bases

[H⁺] 0.001 M

What's happening? pH = -log[H⁺]. Lower pH = more acidic. Neutral = 7. Each unit change = 10× change in [H⁺]. Strong acids have pH 1-3, weak acids 4-6.

⚡ Reaction Rate

Kinetics

Temperature 300 K

Catalyst 0

What's happening? Rate = A·e^(-Ea/RT). Higher T = faster reaction. Catalyst lowers Ea, increases rate without being consumed.

Keep exploring

Try the Physics and Maths labs too.

136 interactive visualizers across all three JEE subjects.

Physics Lab Maths Lab

Full library

All Chemistry Simulations

🔥 Enthalpy & Hess's Law

Thermochemistry

ΔH₁ (kJ/mol) -286 kJ/mol

ΔH₂ (kJ/mol) -393 kJ/mol

⚡ Galvanic Cell

Electrochemistry

Anode E° (V) -0.76 V

Cathode E° (V) 0.34 V

⚖️ Stoichiometry

Physical Chemistry

Moles reactant 2 mol

Mole ratio 1

🧪 Acid–Base Titration

Equilibrium

Acid Conc (M) 0.1 M

Base Conc (M) 0.1 M

Acid Volume (mL) 50 mL

💨 Gas Laws (PVT)

Physical Chemistry

Pressure (atm) 1 atm

Temperature (K) 298 K

🔮 VSEPR Theory

Chemical Bonding

Bonding Pairs 4

Lone Pairs 0

⚗️ Buffer Solutions

Equilibrium

pKa 4.74

[A⁻]/[HA] 1

⚡ Electrolysis (Faraday)

Electrochemistry

Current (A) 2 A

Time (min) 30 min

Molar Mass 63.5 g/mol

📈 Arrhenius Equation

Kinetics

Ea (kJ/mol) 50 kJ/mol

Temperature (K) 298 K

🧂 Solubility Product (Ksp)

Equilibrium

Ksp ×10⁻⁶ 1.8

Ion charge 1

🌐 Atomic Orbitals

Structure of Atom

Principal n 2

Azimuthal l 1

♻️ Hess's Law

Thermochemistry

Step 1 ΔH -286 kJ/mol

Step 2 ΔH -107 kJ/mol

⚡ Nernst Equation

Electrochemistry

E° cell (V) 1.1 V

Electrons n 2

Reaction Q 1

☢️ Radioactive Half-Life

Nuclear Chemistry

Half-life (h) 10 h

Initial amount 1000

🧊 Colligative Properties

Solutions

Molality (mol/kg) 1 mol/kg

Van't Hoff i 1

🔬 Electronic Configuration

Structure of Atom

Atomic Number Z 26

⚖️ Redox Balancing

Redox

Oxidant coeff 2

Reductant coeff 3

💨 Graham's Law

Kinetics

Molar mass 1 (g/mol) 2 g/mol

Molar mass 2 (g/mol) 32 g/mol

🗂️ Periodic Trends

Periodicity

Period 3

Group 1

🔗 Molecular Orbital Theory

Chemical Bonding

Total Electrons 8

Bond order 1

💎 Crystal Field Theory

Coordination

Δo (cm⁻¹) 10000 cm⁻¹

Pairing energy 20000 cm⁻¹

📊 Adsorption Isotherms

Surface Chemistry

Freundlich k 1

1/n value 0.5

🔄 Structural Isomerism

Organic Chemistry

Carbon atoms 4

Halogen count 1

🔷 Unit Cell & Crystal

Solid State

Type (1=SC,2=BCC,3=FCC) 2

Ionic radius 1.4 Å

⚗️ SN1 vs SN2

Organic Chemistry

Leaving group quality 3

Nucleophile conc 3 M

🌈 Hydrogen Spectrum

Structure of Atom

Upper level n₂ 4

Lower level n₁ 2

🔗 Hydrocarbon Types

Organic Chemistry

Carbon chain 6

Saturation 1

➡️ Elimination Reaction

Organic Chemistry

Temperature 80 °C

Base strength 3

🍷 Alcohol Reactions

Organic Chemistry

Alcohol type 2

Reagent 2

⚗️ Carbonyl Reactions

Organic Chemistry

Nucleophile 2

pH 7

🧴 Carboxylic Acid Derivatives

Organic Chemistry

Leaving group 2

Nucleophile 3

🔵 Amine Basicity

Organic Chemistry

Amine type 2

Substituent effect 1

🧬 Biomolecules

Biomolecules

Molecule type 1

Chain length 6

🔗 Polymer Chains

Polymers

Degree of polymerization 1000

Monomer MW 100 g/mol

🔮 d & f Block Elements

d-f Block

Atomic Number 26

Oxidation state 2

📊 p-Block Elements

p-Block

Group (13-18) 15

Period 3

🔑 s-Block Elements

s-Block

Group (1-2) 1

Period 3

💧 Hydrogen Compounds

Hydrogen

H-bond strength 3

Isotope mass 1

⚒️ Metallurgy

General Principles

Ore grade (%) 20 %

Temperature (°C) 1000 °C

🌱 Environmental Chemistry

Environmental

Pollutant level 100 ppm

Rain pH 5.6

🔬 Practical Chemistry

Practical

Indicator choice 2

Normality 0.1 N

🧪 Aldehyde & Ketone

Organic Chemistry

Aldehyde=1/Ketone=2 1

Nucleophile 3

⚛️ Atomic Structure

Structure of Atom

Atomic Number 6

Electron shell 2

🔗 Chemical Bonding

Chemical Bonding

Electronegativity 1 2.1

Electronegativity 2 3.5

💎 Coordination Compounds

Coordination

Ligand count 6

Central ion charge 3

FAQs

Common questions

How many chemistry simulators are available?

51 interactive simulators covering Physical, Organic and Inorganic Chemistry topics relevant to JEE Main and Advanced.

Which chemistry labs are most useful for JEE?

Chemical Equilibrium, Electrochemistry (Galvanic, Nernst), Chemical Kinetics, Atomic Structure, and Coordination Compounds are the highest-value simulators.

Do the simulators cover organic chemistry reactions?

Yes. Simulators for SN1/SN2 mechanisms, elimination reactions, carbonyl reactions, and isomerism help visualize organic reaction pathways.

Are numerical values accurate in chemistry simulators?

Yes, all calculations use standard constants and formulas from NCERT and JEE-level references. Values update in real time as you adjust parameters.

Can I use these for board exam preparation too?

Absolutely. The concepts covered align with CBSE Class 11-12 Chemistry syllabus, making them useful for both boards and JEE.

Direct answer

Use Chemistry Concept Lab to turn a Chemistry idea into one solved question.

This simulator is most useful when you predict the change first, move the controls second, and then solve a related JEE-style question without looking at the screen. Do not treat it like a video. Treat it like a small lab for checking whether the formula, graph, trend, or mechanism is actually clear in your head.

How

How to use this tool

Read the formula or rule on the page and write your prediction before touching the controls.
Change only one slider, value, or option at a time. If you change everything together, you will not know what caused the result.
Say the reason out loud in one sentence: the graph shifts because of this term, the value changes because of this relation, or the reaction changes because of this condition.
Solve one matching PYQ or coaching-sheet question immediately after using the simulator. The visual is only useful if it improves paper solving.
Add one line to your error log if your prediction was wrong. Write the exact trigger you missed, not just "concept weak".

Example

A realistic way to practise

For a Chemistry trend, reaction, or formula question, change one condition at a time and say which species, value, or product should increase before checking the screen. If your prediction and the simulator disagree, pause there. Re-read the formula, test one smaller case, and only then move to a timed question.

Checklist

Before you leave this page

You can explain the main rule in under 20 seconds.
You solved at least one related question on paper after using the visual.
You know one common mistake this topic creates in JEE problems.
You saved the topic in your revision or error-log system if it still feels shaky.

What to do next

Take your next step

1. Mark the topic in A2Z

Track this page against the actual Physics, Chemistry, and Maths syllabus so it affects your plan.

Open

2. Build today's study block

Convert the advice into one focused session with revision, practice, and review.

Open

3. Use the mission router

If you are unsure what to open next, route by your current problem instead of reading randomly.

Open

Real example

Putting this into practice

How to apply this: Open the page titled "Chemistry Concept Lab", read the summary and key points, then pick one action from the "What to do next" section below. Write down the specific official source you need to verify (dates, fees, rules, or eligibility) and check it today instead of bookmarking it for later.

Before you leave

Quick checklist

I read the concept explanation before jumping to problems.
I tried at least 2 practice problems on my own.
I noted which formula or step I keep forgetting.
I connected this concept to related JEE topics.
I added this to my revision list if it needs more practice.