Select the incorrect statement
A. `N_(2)O` with sodium metal in liquid ammonia forms sodium azide and nitrogen gas is liberated
B. Ammonia is oxidised to nitrogen by dilute solution of `NaOCl` in presence of glue
C. `(NH_(4))_(2)Cr_(2)O_(7)` on heating decomposes to give nitrogen and a green coloured compound.
D. CaNCN on hydrolysis produces a white precipitate and a gas which turns filter paper moistened with copper sulphate solution deep blue
