Which of the following compounds reacts with $CHCl_3$ and $KOH$ to produce an isocyanide?

Which of the following compounds reacts with sodium metal to release hydrogen gas?

$Br-CH_2-(CH_2)_2-CH_2-Br + CH_3NH_2 \to$ The product of the reaction is:

$A$ mixture of ethyl amine,chloroform,and alcoholic $KOH$ on heating gives:

Consider the three aromatic molecules ($P$, $Q$ and $R$) whose structures are given below. The correct order regarding the reactivity of these compounds with $Ph-N\equiv N^{(+)}Cl^{(-)}$ under optimum but slightly acidic medium is:

State True or False for the following statements:
$(i)$ Aniline becomes polar in its resonance structure.
$(ii)$ The separation of charge occurs in the resonance structure of aniline.
$(iii)$ The $NH_2$ group of aniline is electron donating.
$(iv)$ The $NH_2$ group of aniline is electron attracting in resonance $(-R)$.