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

Name a salt prepared by direct combination. Write an equation for the reaction that takes place in preparing the salt you have named.

Define the term neutralization, Give a reaction, mentioning clearly acid and base used in the reaction.

Define the term neutralization, if one mole of a strong acid reacts with one mole of a strong base, the heat produced is always the same. Why?

What do you observe when freshly precipitated aluminium hydroxide reacts with caustic soda solution? Give balanced equation.

Name the metal hydroxides which are:

Sparingly soluble

In caustic soda solution

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.