Class 12 Chemistry NCERT Solutions

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Class 12 Chemistry NCERT Solutions

Complete, step-by-step solutions to every NCERT Class 12 Chemistry exercise — written by an IIT-Delhi educator and exam-ready for CBSE boards, JEE and NEET. Solutions open with a one-line answer, then the full working.

Class:12Subject:ChemistryCovers:Intext + Back Exercises

6 Key Formulas24 Practice MCQs

DWritten byDeep Narayan

Key Concept Summary

Are these the official NCERT Class 12 Chemistry solutions?

These are the worked solutions to every question in the NCERT Class 12 Chemistry textbook, solved step-by-step by the ClassApna faculty (B.Tech IIT Delhi) and cross-checked by a chemistry reviewer. They follow the latest CBSE rationalised syllabus chapter order.

How these solutions work

Each chapter page solves the NCERT textbook chapter question by question. Intext questions (the ones beneath each concept) and back-of-chapter exercises are separated, and every question opens with a final answer before the full step-by-step working, so you can check your answer first and then read the method.

Intext questions: solved in sequence, one expandable card per question, ordered answers cross-checked against the final answer box.
Back exercise: numbered exactly as the NCERT chapter numbers them.
Formula-first method: each working starts from the defining equation and substitutes, so you see where the numbers come from.
Solved by a real coaching faculty — not auto-generated — and reviewed by a second chemistry educator.

How to use

Attempt each question yourself first, then open the solution. If your final answer matches the green box you were right; if not, read the working to find exactly where the marked steps diverge. Pair a chapter's solutions with its

Class 12 Chemistry Notes

for formula revision before you practise.

Chapters covered

Definition

Chapter 1 — Solutions

Raoult's law, colligative properties, van't Hoff factor — intext and back exercise solutions, solved in full.

Definition

Chapter 2 — Electrochemistry

Galvanic cells, Nernst equation, conductance, electrolysis and Faraday's laws — intext and back exercise solutions, solved in full.

Definition

Chapter 3 — Chemical Kinetics

Rate laws, integrated rate equations, half-life and Arrhenius equation — solved in full.

Chapter 4 — The d- and f-Block Elements
Chapter 5 — Coordination Compounds
Chapter 6 — Haloalkanes and Haloarenes
Chapter 7 — Alcohols, Phenols and Ethers
Chapter 8 — Aldehydes, Ketones and Carboxylic Acids
Chapter 9 — Amines
Chapter 10 — Biomolecules

Syllabus note

Pages are published chapter by chapter, in the same order we ship the notes. New solutions pages are linked here the moment they go live — check back or use the chapter link below.

Quick Revision

Key formulas at a glance

Memorise these equations — direct application numericals and derivations in CBSE & JEE frequently hinge on these.

Mole fraction

x_{B} = \frac{n _{B}}{n _{A} + n _{B}}

Mole fraction of B in a two-component solution.

Molarity / molality

M = \frac{n}{V _{(L)}}, m = \frac{n}{kg of solvent}

Molarity is volume-based, molality is mass-based (temperature-independent).

Raoult's law

p_{A} = p_{A}^{\circ} x_{A}

Vapour pressure of A ∝ mole fraction for ideal solutions.

Nernst equation

E = E^{\circ} - \frac{0.0591}{n} lo g Q

Cell potential at non-standard concentrations (298 K); n = electrons transferred.

Faraday's first law

m = \frac{QM}{n F}

Mass deposited ∝ charge passed; F = 96500 C mol⁻¹.

Half-life (first order)

t_{1/2} = \frac{0.693}{k}

Used in the Chemical Kinetics chapter solutions.

FAQ

Frequently asked questions

Which chapters of Class 12 Chemistry have solved NCERT solutions here?

Solutions (Ch 1), Electrochemistry (Ch 2) and Chemical Kinetics (Ch 3) are solved and live. The remaining chapters are published continuously in the same order as the notes — check the 'Chapters covered' section on this page for the latest list.

Do I need to sign up to read the solutions?

No. Every NCERT solution on ClassApna is free to read, no signup required.

Are solutions and notes different pages?

Yes. Notes are the concept summaries (formulas + exam pointers) and solutions are the question-by-question NCERT workings. Open a chapter's solutions when you practise, and its notes when you revise the theory.

How are these solutions checked for correctness?

Each solution is written by the founding educator (Deep Narayan, B.Tech Civil Engineering IIT Delhi) and reviewed by a second chemistry faculty member before publishing — the same E-E-A-T process used for the Class 12 notes.

Next Chapters

Continue learning

Solutions Class 12 Chemistry NCERT Solutions (Ch 1)Electrochemistry Class 12 NCERT Solutions (Ch 2)Chemical Kinetics Class 12 NCERT Solutions Class 12 Chemistry Notes All Class 12 Notes

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