ICSE ICSE Class 8 - CISCE Question Bank Solutions

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.

Name the chemicals required to prepare hydrogen gas in the laboratory.

Name the chemicals required to prepare hydrogen gas in the laboratory.

Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen.

Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen.

How is hydrogen gas collected? Why?

How is hydrogen gas collected? Why?

How would you show that hydrogen is a non-supporter of combustion?

How would you show that hydrogen is a non-supporter of combustion?