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

Give one example in the following case:

A basic oxide which is insoluble in water.

Give one example in the following case:

A hydroxide which is insoluble in water.

Give one example in the following case:

A base which is not an alkali.

Give one example in the following case:

An oxide which is a base.

Give one example in the following case:

A base which does not contain a metal ion.

How would you obtain an alkali from a base.

Distinguish between acid and alkali (other than indicators).

Convert hydrochloric acid to nascent chlorine.

What is the difference between an alkali and a base?

Prove the Following :
2 X V.D. = Molecular mass.

Define the term:

Vapour density

Calculate the relative molecular mass of Potassium chlorate.
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S=32)

Calculate the relative molecular mass of Sodium acetate
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S= 32)

Calculate the relative molecular mass of Chloroform.
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S= 32)

Calculate the relative molecular mass of Ammonium sulphate.
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S= 32)

Fill in the blank.
Molecular weight of a gas is twice its __________.

Calculate the percentage composition of oxygen in lead nitrate [Pb(NO₃)₂]. [Pb = 207, N= 14, O = 16]

The usefulness of a fertilizer depends upon percentage of nitrogen present in it. Find which of the following is a better fertilizer:
(a) Ammonium nitrate [NH₄NO₃]
(b) Ammonium phosphate [(NH₄)₃PO₄ (N=14,H=1,O=16,P=31)

Empirical formula of a compound is CH₂O. If its empirical formula is equal to its vapour density, calculate the molecular formula of the compound.

Potassium nitrate on strong heating decomposes as under :
2KNO₃ → 2KNO₂ + O₂
Calculate : Weight of potassium nitrite formed.
(K = 39, 0 = 16, N = 14)