Please give me answer to these practicals ..plz

Answer 14: 
Correct option is (A) Blue. This is because, excess NaOH neutralises acid and then makes litmus blue as it is a base.

Answer 15:
Correct option is (D) Ethyl ethanoate (ester). The reaction is esterification.

C₂H₅OH + CH_​3COOH $\stackrel{H^{+}}{\to }$ CH₃COOC₂H₅

Answer 16:
Correct option is (A) Methane. The reactions are as follows:

CH_​3COOH + NaOH $\to$ CH₃COONa + H₂O

CH₃COONa  + NaOH + CaO $\to$ CH₄ + CO₂

For further query please ask in separate thread.