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

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.

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

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

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

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

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

Convert Hydrochloric acid to nascent chlorine.