Glycerol reacts with potassium bisulphate to produce

Nitroglycerine is

The major product of the following reaction is:

Dehydration of which of the following compounds gives only $hept-3-ene$?

$CH_3-CH(CH_3)-CH(OH)-CH_3$ $\xrightarrow[350^\circ C]{Al_2O_3} (A)$ $\xrightarrow[(ii) AgOH]{(i) HI} (B)$
Product $(B)$ of the above reaction is:

In the following sequence of reactions,the compound $C$ formed will be:
$CH_3-CH(NH_2)-CH_3$ $\xrightarrow{HNO_2} A$ $\xrightarrow{\text{Oxidation}} B$ $\xrightarrow[(ii) H^+/H_2O]{(i) CH_3MgI} C$