Question

Ammonium dichromate is used in some fireworks. The green-coloured powder blown in the air is (IIT JEE,1997)

• A. $Cr{O}_3$
• B. $C{r}_2{O}_3$
• C. Cr
• D. $CrO\left(O_2\right)$

Answer 1

The correct option is B $C{r}_2{O}_3$

Ammonium dichromate is used in some fireworks. The green-coloured powder which blows in air is $C{r}_2{O}_3.$
$(N{H}_4{)}_{2}C{r}_2{O}_7\stackrel{△}{\to }C{r}_2{O}_3+N_2+4H_{2}O$