[BHU 1973, 78; CBSE PMT 1993; MP PMT 1993]
A) Chromium oxide and ammonia
B) Chromic acid and nitrogen
C) Chromium oxide and nitrogen
D) Chromic acid and ammonia
Correct Answer: C
$ {{(NH_4)}_2}Cr_2O_7\xrightarrow{\Delta }Cr_2O_3+N_2+4H_2O $
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