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

Name the metal hydroxides which are : 
(a) Insoluble (b) Soluble in
(i) Caustic soda solution (ii) Ammonium hydroxide solution.

Name the metal hydroxides which are soluble in caustic soda solution.

What do you observe when ammonium hydroxide is added to the aqueous solution of FeSO₄? Write a balanced equation for this.

What do you observe when ammonium hydroxide is added to the aqueous solution of Iron (III) chloride? Write a balanced equation for this.

What do you observe when ammonium hydroxide is added to the aqueous solution of Lead nitrate? Write a balanced equation for this.

What do you observe when ammonium hydroxide is added to the aqueous solution of Zinc nitrate? Write a balanced equation for this.

Why is ammonium hydroxide used in qualitative analysis? Give two equations to justify your answer.

When ammonium hydroxide is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide, giving an inky blue solution. What is the cation [positive ion] present in solution B? what is the probable colour of solution B?

Q. 24

Why is water not added to concentrated H₂SO₄ in order to dilute it?

Give two balanced reactions of the type to show the following property of sulphuric acid:

Acidic nature

Give two balanced reactions of the type to show the following property of sulphuric acid:

Oxidising agent

Give two balanced reactions of each type to show the following properties of sulphuric acid:
Hygroscopic nature

Give two balanced reactions of the type to show the following property of sulphuric acid:

Non-volatile nature

Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid.

Give a chemical test to distinguish between dilute sulphuric acid and conc. sulphuric acid.

Name the products formed when hot and concentrated sulphuric acid reacts with Sulphur.

Name the products formed when hot and concentrated sulphuric acid reacts with NaOH.

Name the products formed when hot and concentrated sulphuric acid reacts with Sugar.

Name the products formed when hot and concentrated sulphuric acid reacts with Carbon.