Class 10 ICSE Chemistry 2025 Most Predicted Questions

Q. No.

Questions

1

Assertion (A): Alkali metals do not form dipositive ions.

Reason (R): After loss of one electron alkali metals achieve stable electronic configuration of noble gases.

Both A and R are true and R is the correct explanation of A

Both A and are true but R is not the correct explanation of A

A is true but R is false

A is false but R is true

2

Unsaturated hydrocarbons undergo:

1. Addition reaction
2. Substitution reaction
3. Oxidation reaction
4. Redox reaction

3

Identify the cation in each of the following cases:

(a) Ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of ammonium hydroxide solution.

(b) Sodium hydroxide solution when added to Solution C gives a white precipitate which is insoluble in excess of sodium hydroxide solution.

4

Name the following elements:

(i) An alkaline earth metal present in group 2 and period 3.

(ii) A trivalent metal used to make light tools.

(iii) A monovalent non-metal present in fluorspar.

5

Name the following organic compounds:

(i) The compound with 3 carbon atoms whose functional group is a carboxyl.

(ii) The first homologue whose general formula is CnH2n

(iii) The compound that reacts with acetic acid to form ethyl ethanoate.

(iv) The compound formed by complete chlorination of ethyne.

6

Aqueous lead (II) nitrate can be distinguished from aqueous zinc nitrate by adding any of the following solution in excess, except:

1. aqueous potassium chloride
2. aqueous sodium sulphate
3. dilute sulphuric acid
4. sodium hydroxide solution

7

Differentiate between the following pairs based on the criteria given:

(a) Sulphuric acid and Nitric acid (using barium chloride solution)

(b) Unsaturated and Saturated hydrocarbons (type of bond present)

8

Arrange the following according to the instructions given in brackets:

(a) C2H2, C3H6, CH4, C2H4 (In the increasing order of the molecular weight)

(b) Cu2+, Na+, Zn2+, Ag+ (The order of Preferential discharge at the cathode)

9

Give the chemical formula of:

(i) Bauxite

(ii) Cryolite

(iii) Sodium aluminate

10

Which of the following about oxides is correct?

1. A basic oxide is an oxide of a non-metal
2. Acidic oxides contain ionic bonds
3. Amphoteric oxides contain a metal
4. Basic oxides are always gases

11

Arrange the following as per the instructions given in the brackets:

(a) Carbon, Fluorine, Beryllium (decreasing order of atomic size)

(b) Sulphuric acid, Phosphoric acid, Acetic acid (increasing order of number of replaceable H atoms per molecule)

(c) Potassium, Lithium, Sodium (increasing order of ionization potential)

12

Convert the following reactions into a balanced chemical equation:

(a) Ammonia to nitric oxide using oxygen and platinum catalyst.

(b) Sodium hydroxide to sodium sulphate using sulphuric acid.

(c) Ferrous sulphide to hydrogen sulphide using hydrochloric acid.

13

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.

14

The drying agent used to dry HCl gas is:

1. Conc. H₂SO₄
2. ZnO
3. Al₂O₃
4. CaO

15

The salt formed when concentrated sulphuric acid reacts with KNO₃ above 200°C:

1. K₂SO₄
2. K₂SO₃
3. KHSO₄
4. KHSO₃