The dehydrobromination of $2-bromobutane$ gives $CH_3-CH=CH-CH_3$. The product is

What are $X, Y$ and $Z$ in the following reactions?
$(CH_3)_3 C-O^- Na^+ + CH_3 CH_2 Br \longrightarrow X + NaBr$
$(CH_3)_3 C-Br + CH_3 CH_2 O^- Na^+ \longrightarrow Y + Z$

Which of the following is added to chloroform to slow down its aerial oxidation in the presence of light?

$C_2H_5I$ $\xrightarrow{\text{alc. } KOH} X$ $\xrightarrow{Br_2} Y$ $\xrightarrow{KCN} Z$; $Z = \dots$

Write a note on Grignard Reagent.

The formation of butane nitrile is possible in which of the following reactions?