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Choose the Best Answer · Q24

Q.When CaC₂ is heated in atmospheric nitrogen in an electric furnace the compound formed is

a) Ca(CN)₂
b) CaNCN
c) CaC₂N₂
d) CaNC₂
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Step 1. This is the industrial Frank-Caro (nitrolim) process: calcium carbide reacts with atmospheric nitrogen in an electric furnace to give calcium cyanamide plus carbon, CaC₂ + N₂ → CaNCN + C.

Step 2. Calcium cyanamide is written CaNCN (or equivalently CaCN₂) here, reflecting the linear N=C=N²⁻ cyanamide anion paired with Ca²⁺. …

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