Distinguish between ethane [saturated] and ethene [unsaturated] by drawing their structural formulae.

Write the equation for the following :

(i) Calcium carbide and water

(ii) Ethene and water (steam)

(ii) Bromoethane and an aqueous solution of sodium hydroxide

Which type of reaction i.e. addition or substitution is shown by ethane and ethene ?

The formation of 1, 2-dibromoethane from ethene and bromine is an example of :

1. Substitution
2. Dehydration
3. Dehydrohalogenation
4. Addition