ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

With reference to the liquid state of matter – answer the following

State why the inter-particles attraction decreases to negligible.

Complete the statement by filling the blank with the correct word given below.

In naphthalene, the inter-particle attraction is _______.

Complete the statement by filling the blank with the correct word given below.

The law of conservation of mass is strictly valid if mass and _________ are considered together.

Complete the statement by filling the blank with the correct word given below.

When inter-particle space increases, the inter-particle attractive force _______________.

Give the reason for the following 

Particles of matter move more rapidly on the application of heat.

Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in the following case.

During soldification, the inter-particle space __________ gently.

Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in the following case.

During sublimation, the inter-particle attraction is _______________.

Write the names and symbols of the first twenty elements that you have studied in class VI & VII.

Give the symbols and valencies of following radicals:
(a) Hydroxide (b) Chloride
(c) Carbonate (d) ammonium
(e) Nitrate

Indicate which of the following statement is true and which is false:

Nitric acid cannot be used to prepare hydrogen by its action on active metals.

Indicate which of the following statement is true and which is false:

Nitric acid cannot be used to prepare hydrogen by its action on active metals.

Indicate which of the following statement is true and which is false: 

Zinc can liberate hydrogen from water, acid and alkali solution.

Indicate which of the following statement is true and which is false: 

Zinc can liberate hydrogen from water, acid and alkali solution.

Give reason for the following:

Nitric acid not used for the preparation of hydrogen gas?

Give reason for the following:

Nitric acid not used for the preparation of hydrogen gas?

Name the following:

 A metal which liberates hydrogen only when steam is passed over red hot metal.

Name the following:

 A metal which liberates hydrogen only when steam is passed over red hot metal.

Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.

\[\ce{Zn_{(s)} + H2SO4 -> ZnSO4_{(s)} + H2_{(g)}}\]

 Name the following:

 A metallic oxide which can be reduced into metal by hydrogen.

 Name the following:

 A metallic oxide which can be reduced into metal by hydrogen.