Choose the correct answer from the options given – If the molecular formula of an organic compound is C₁₀H₁₈ it is –

(i) Alkene
(ii) Alkane
(iii) Alkyne
(iv) Not a hydrocarbon

Give a balanced chemical equation for each of the following –

(i) Preparation of ethane from sodium propionate.

(ii) Action of alcoholic KOH on bromoethane.

Identify the substance underlined – An organic compound containing – COOH functional group.