Which of the following has the smell of bitter almonds?

Classify the following amines as primary,secondary,or tertiary:
$(i)$ $1-$naphthylamine
$(ii)$ $N,N$-dimethyl$-1-$naphthylamine
$(iii)$ $(C_2H_5)_2CHNH_2$
$(iv)$ $(C_2H_5)_2NH$

The $IUPAC$ name of $CH_3-CH_2-N(CH_3)-CH_2-CH_3$ is:

How many structural isomers are possible for $C_7H_9N$ containing a benzene ring?

Which among the following compounds does not correctly match with its formula?

Which of the following is not a nitro-derivative?