11 papers · 2016–2026

Most asked in ICSE Chemistry

What the board keeps coming back to, measured across every Chemistry paper from 2016–2026. Revise these first — then sit a full paper and get it marked.

Chapters that appear every year

How many of the 11 papers each chapter appeared in, and the marks it carries in an average paper.

Topics asked again and again

The same idea, set in different years. If it came up this often, expect it.

11 years

Organic chemistry: structure, nomenclature and reactions

Organic Chemistry

20162017201820192020202120222023202420252026

11 years

Electrolysis, electrolytes and electrode processes

Electrolysis

20162017201820192020202120222023202420252026

11 years

Qualitative analysis using NaOH and NH₄OH

Analytical Chemistry: Uses of Ammonium Hydroxide and Sodium Hydroxide

20162017201820192020202120222023202420252026

10 years

Periodic properties and trends

Periodic Table, Periodic Properties and Variations of Properties

2016201720182019202020212023202420252026

10 years

Metallurgy, ores, extraction and alloys

Metallurgy

2016201720182019202020222023202420252026

10 years

Mole concept, gas volumes and stoichiometry

Mole Concept and Stoichiometry

2016201720182019202020212023202420252026

10 years

Sulphuric acid: preparation and properties

Sulphuric Acid

2016201720182019202020222023202420252026

10 years

Chemical bonding and electron structures

Chemical Bonding

2016201720182019202020212023202420252026

10 years

Acids, bases, salts and pH

Acids, Bases and Salts

2016201720182019202020212023202420252026

10 years

Nitric acid: preparation and properties

Study of Compounds – Nitric Acid

2016201720182019202020222023202420252026

9 years

Ammonia: preparation, properties and reactions

Study of Compounds – Ammonia

201620172018201920222023202420252026

9 years

Practical tests and observations

Practical Work

201620172018201920202022202420252026

Quick check: five MCQs

One from each of the most-asked chapters. Pick an answer — it is marked straight away.

1(iii)2026 Mole Concept and Stoichiometry

MCQ1 mark

Shared context

Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)

The electronic configuration of an element is 2,8,2. The hydroxide of this element can produce ............... hydroxyl ions per molecule.

Choose an answer

3210

1(iv)2026 Electrolysis

MCQ1 mark

Shared context

Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)

With respect to the electrolysis of copper (II) sulphate solution using copper electrodes, which statement is correct?

Choose an answer

Copper metal is deposited at the negative electrode.Oxygen gas is produced at the positive electrode.The positive electrode increases in mass.The negative electrode decreases in mass.

1(v)2026 Organic Chemistry

MCQ1 mark

Shared context

Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)

Identify the equation that shows the reaction of ethane with chlorine in the presence of ultraviolet light.

Choose an answer

C₂H₆ + Cl₂ → C₂H₆Cl₂C₂H₆ + Cl₂ → C₂H₄Cl₂ + H₂C₂H₆ + Cl₂ → C₂H₅Cl + HClC₂H₆ + Cl₂ → 2CH₃Cl

1(ix)2026 Acids, Bases and Salts

MCQ1 mark

Shared context

Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)

Salts can be prepared by the action of dilute acid on: 1. bases 2. carbonates 3. metals 4. sulphites The method which cannot be used for the preparation of copper salts is:

Choose an answer

1234

1(vi)2025 Periodic Table, Periodic Properties and Variations of Properties

MCQ1 mark

Shared context

Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)

Assertion (A): The tendency of losing electrons increases down the Group. Reason (R): The most reactive metal is placed at the top of Group 1.

Choose an answer

Both (A) and (R) are true, and (R) is the correct explanation of (A).Both (A) and (R) are true, and (R) is not the correct explanation of (A).(A) is true but (R) is false.(A) is false but (R) is true.

Practise every Chemistry MCQ →

Repeated questions, with answers

The latest time each of the top repeated topics was set.

2(v)(a)2026 Organic Chemistry

Short answer2 marks

Give the IUPAC name for the following organic compounds:

Open question →

2(ii)(d)2023 Electrolysis

Short answer2 marks

Shared context

The following sketch illustrates the process of conversion of Alumina to Aluminium: Study the diagram and answer the following:

Write the reactions taking place at the electrodes 'Y' (anode) and 'Z' (cathode) respectively.

Open question →

5(iv)(b)2025 Analytical Chemistry: Uses of Ammonium Hydroxide and Sodium Hydroxide

Short answer2 marks

Shared context

Rohit took two different salt solutions in test tubes C and D as shown in the figure below. He added dilute HCl to each of the two test tubes. The products formed in the test tubes C and D are silver chloride and lead chloride respectively. State:

the observations made by him on addition of excess of ammonium hydroxide to the products formed in: 1. test tube C 2. test tube D

Open question →

7(iv)(a)2024 Periodic Table, Periodic Properties and Variations of Properties

Short answer2 marks

Shared context

The following table shows the electronic configuration of the atoms A, B, C and D.

Write the formula of the compound formed between: 1. A and B 2. D and C

Open question →

3(a)2020 Metallurgy

Short answer3 marks

Baeyer's process is used to concentrate bauxite ore to alumina. Give balanced chemical equations for the reaction taking place for its conversion from bauxite to alumina.

Open question →

Free with an account

Sit a full Chemistry paper. Get it marked.

A suggested paper built from these questions in the current board pattern. Write it on paper, upload photos, and see where the marks went — question by question.

Try a marked paper