Give suitable chemical term for:
A reaction in which hydrogen of an alkane is replaced by a halogen.

Identify the statement that is incorrect about alkanes :

A: They are hydrocarbons.

B: There is a single covalent bond between carbon and hydrogen.

C: They can undergo both substitution as well as addition reactions.

D: On complete combustion they produce carbon dioxide and water.

Give balanced equations for the laboratory preparations of:

(i) A saturated hydrocarbon from iodomethane.

(ii) An unsaturated hydrocarbon from an alcohol.

(iii) An unsaturated hydrocarbon from calcium carbide.

(iv) An alcohol from ethyl bromide.

Identify the gas evolved when : sodium propionate is heated with soda lime.