Question

Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is

• A. Cr$O_3$
• B. $Cr_2O_3$
• C. Cr
• D. CO

Answer 1

Answer: (B)

$Cr_2O_3$

Answer 2

Ammonium dichromate [(NH$_4)_2Cr_2O_7$ ]on heating decomposes producing green powder of Cr$_2O_3$ and N$_2$(g) is evolved