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

Name a weak alkali.

Name two colourless metal ions.

Name two coloured metal ions.

Name a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.

Name two bases which are not alkalis but dissolves in strong alkalis.

Write balanced equation for a metal that evolves a gas which burns with a pop sound when boiled with alkali 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 a 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