Calcium Cyanamide - CaNCN, which is produced by the Nitrogen fixation reaction of heating CaC2 and N2 is black in colour – True or False?
A
True
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B
False
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Solution
The correct option is A True Let us recall the cyanamide process: CaC2+N2→CaCN2+C
As you can see, there is some carbon produced as the product. This gives CaNCN a black colour. When hydrolyzed in soil, CaNCN yields ammonia. A simple version of the reaction may be understood as CaCN2+3H2O→2NH3+CaCO3
In some interpretations, another reaction is also considered: CaCN2+4H2O→ Ca(OH)2+CO2+2NH3