Give suitable chemical terms for the following:

The process in which a substance absorbs moisture from the atmospheric air to become moist, and ultimately dissolves in the absorbed water.

Give suitable chemical terms for the following:

A salt formed by incomplete neutralisation of an acid by a base.

Give suitable chemical terms for the following:

A definite number of water molecules bound to some salts.

Identify the gas evolved in the following reaction when:

Concentrated hydrochloric acid is made to react with manganese dioxide.

State one appropriate observation for each of the following:

Copper sulphide is treated with dilute hydrochloric acid.

Give suitable chemical term for the following:

A reaction in which hydrogen of an alkene is replaced  by a halogen.

Give a chemical test to distinguish between the following pair of the compound;

zinc nitrate and calcium nitrate

Identify the following substance which is underlined.

Choose the most appropriate answer from the following option:

Among the period 2 elements, the element which has high electron affinity.

• Lithium

• Carbon 

• Chlorine 

• Chlorine 

Choose the most appropriate answer from the following option:
 Among the following compounds identify the compound that has all three bonds (ionic, covalent and coordinate bond).

• Ammonia

• Ammonium chloride

• Sodium hydroxide

• Sodium hydroxide