. Ammonium dichromate is used in fireworks. The green coloured powder blown in the air is a) CrO3 b) Cr2O3 c) Cr d) CrO (O2)
. Ammonium dichromate is used in fireworks. The green coloured powder blown in the air is a) CrO3 b) Cr2O3 c) Cr d) CrO (O2)










