Answer: Option A
:
A
Cyanamide is an important organic chemical, which is used in agriculture and in the production of various pharmaceuticals and other organic compounds. It can be thought of as a nitrile group attached to an amine group.
Calcium Cyanamide is CaNCN, an inorganic compound that is extensively used as a fertilizer. It is synthesized by the famous Frank-Caro process (also known as the cyanamide process) where Calcium Carbide is heated with $N_2$gas in a reactor at 1273 K. The reaction is exothermic:
$Ca{C}_2$ + $N_2$ $\to$ CaNCN + C
( Calcium (Nitrogen) ( Calcium (Carbon)
Carbide) Cyanamide)
$CaC{N}_2$ + $4H_{2}O$ $\to$ $Ca(OH{)}_2$ + $C{O}_2$ + $2N{H}_3$
(Calcium hydroxide) (Ammonia)