(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Name the anion present in the following compound:

Compound A, when warmed with concentrated sulphuric acid, gives a gas which fumes in moist air and which gives dense white fumes with ammonia.

Copy and complete the following table which refers to the action of heat on some carbonates:

Distinguish by a chemical test sodium carbonate and sodium sulphite.

Distinguish by a chemical test sodium chloride and sodium sulphide.

Distinguish by a chemical test sodium hydroxide solution and ammonium hydroxide solution.

Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions.

1. When silver nitrate solution is added to a solution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
2. The addition of dilute hydrochloric acid to B produces a gas which turns lead acetate black on paper.
3. When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test tube, a brown ring is formed.
4. When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
5. The addition of dilute hydrochloric acid to E produces effervescence. The gas produced turns lime water milky but does not affect acidified potassium dichromate solution.

Identify the following substance:

Gas C has an offensive smell like rotten eggs.

Define:

Alloy

State the observation for the following, when:

Concentrated sulphuric acid is added to carbon.

Name the alloys for the given composition:

Magnesium and aluminium

Name the alloys for the given composition:

Magnesium + Manganese + Aluminium + Copper

Complete and balance the following reaction, state whether dilute or conc. acid is used.

\[\ce{NH4OH + HCl->}\]

Complete and balance the following reaction, state whether dilute or conc. acid is used.

\[\ce{NH4OH + HCl->}\]

Convert Hydrochloric acid to nascent chlorine.

Write an equation for the reaction of hydrochloric acid on:

Manganese (IV) oxide

Convert Hydrochloric acid to nascent chlorine.

Complete and balance the following reaction, state whether dilute or cone. acid is used.

\[\ce{NA4OH + HCl -> }\]

Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E.

Complete and balance the following reaction, state whether dilutes or conc. acid is used.

\[\ce{NH4OH + HCl -> }\] 

Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D, and E.