When chloroform is treated with conc. $HNO_3$,it gives:

Reaction of trans-$2-$phenyl$-1-$bromocyclopentane with alcoholic $KOH$ produces:

Among the following compounds,which one has the shortest $C-Cl$ bond?

The best method for the preparation of $Me_{3}CCN$ is

In the presence of light,chloroform is slowly oxidised by air to form:

For the reaction $CH_3Br + Nu^{-} \rightarrow CH_3 - Nu + Br^{-}$,arrange the following nucleophiles $(Nu^{-})$ in the decreasing order of their reaction rate: $(1) PhO^{-}, (2) AcO^{-}, (3) HO^{-}, (4) CH_3O^{-}$.