SINGLE CORRECT CHOICE

EXTRA PURE N2 CAN BE OBTAINED ON HEATING (A)NH3 with CuO (B) NH4NO3 (C) (NH4)Cr2O7 (D)Ba(N3)2; EXTRA PURE N2 CAN BE OBTAINED ON HEATING (A)NH3 with CuO (B) NH4NO3 (C) (NH4)Cr2O7 (D)Ba(N3)2

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