An organic compound $\text{CH}_3\text{-CH=CH-CH}_2\text{-CHO}$ is taken in two different containers A and B. Sample in A is treated with $\text{H}_2$ / Ni forming new compound P. Sample in B is treated with $\text{LiAlH}_4$ and hydrolyzed further forming new compound Q. Identify P and Q.

What is the common name for the simplest carboxylic acid, HCOOH ?

Which of the following reactions uses diazonium salt ?

Which of the following statements is NOT correct?