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

Name the following:
The precipitate obtained by treating carbon with hot concentrated sulphuric acid.

Name the Following:
The property used to prepare HCl and HNO₃ from H₂SO₄.

What would you observe in the following case?
Concentrated sulphuric acid is added to equal volumes of cold water.

What would you observe in the following case?
Hot concentrated sulphuric acid is added to sodium chloride crystals.

What would you observe in the following case?
Dilute sulphuric acid is added to ferrous sulphate solution.

Give reason for the following:
When solution of sulphur dioxide is exposed to air, it gets converted to sulphuric acid.

Give reason for the following:
When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.

Give reason for the following:
Sulphuric acid can form two kinds of salts with sodium chloride.

Give reason for the following:
When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.

Give reason for the following:
When carbon is heated with concentrated sulphuric acid, carbon dioxide is formed.

Give reason for the following:
Ammonia gas cannot be dried by passing through concentrated sulphuric acid.

Give reason for the following:
When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.

Give reason for the following:
Concentrated sulphuric acid should not be added to oxalic acid or formic acid in the open laboratory.

Give reason for the following:
When concentrated sulphuric acid is added to blue crystalline copper sulphate, it turns powdery white.

Give reason for the following:
Cotton clothes get burnt with concentrated sulphuric acid.

Give reason for the following:
H₂SO₄ cannot be prepared by heating sodium sulphate with conc. HCl or HNO₃

How are the following conversion brought about? Give equation and condition:
Dilute sulphuric acid to hydrogen.

How are the following conversion brought about? Give equation and condition:
Sodium chloride to hydrogen chloride.

How are the following conversion brought about? Give equation and condition:
Sucrose to sugar charcoal.

How are the following conversion brought about? Give equation and condition:
Oxalic acid to carbon monoxide.