Question

Lime stone is an ore of Calcium. On decomposition gives an oxide (A) and $C{O}_2$ gas. ‘A’ is reduced by Coke to give ‘B’ and Volatile gas.
$B+N_2\underset{{1200}^{\circ }C}{\overset{CaC{l}_2}{\to }}Nitrolim$
Nitrolim is a fertilizer.
The total number of non bonded electrons present in cyanamide ion is

• A. 4
• B. 2
• C. 8

Answer 1

The correct option is C 8

Lime stone is an ore of Calcium. On decomposition gives an oxide (A) and $C{O}_2$ gas. ‘A’ is reduced by Coke to give ‘B’ and Volatile gas.
$B+N_2\underset{{1200}^{\circ }C}{\overset{CaC{l}_2}{\to }}Nitrolim$
Nitrolim is a fertilizer.
Cynamide ion $=C{N}_2^{-2}$ has

Total non bonded electrons = 8