Give the structural formula for the following :

(i) Methanoic acid

(ii) Ethanal

(iii) Ethyne

(iv) Acetone

(v) 2-methyl propane.

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

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 a chemical test to distinguish between : Ethene gas and ethane gas.