Which compound has an addition reaction with - chlorine?

The structures of three hydrocarbons are given below

Which statement is correct for all the above three compounds?

The diagram shows the molecule, ethyl propanoate.

How many bonding pairs of electrons are there in the molecule?

One mole of a hydrocarbon X reacted completely with one mole of hydrogen gas in the presence of a heated catalyst. What could be the formula of X?

Compound X is a six carbon compound. When it is burnt, light is generated. Here, the colour of the flame is yellow because of the presence of carbon particles. Compound X cannot be