Ammonium dichromate is used in some fireworks.The green coloured powder blown in the air is
A.
$$Cr{O_3}$$
B.
$$C{r_2}{O_3}$$
C.
$$Cr$$
D.
$$CrO\left( {{O_2}} \right)$$
Answer :
$$C{r_2}{O_3}$$
Solution :
\[{{\left( N{{H}_{4}} \right)}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\Delta }\] \[\underset{\left( \text{green} \right)}{\mathop{C{{r}_{2}}{{O}_{3}}}}\,+{{N}_{2}}+4{{H}_{2}}O\]
Hence green coloured powder blown in the air is $$C{r_2}{O_3}.$$
Releted MCQ Question on Inorganic Chemistry >> D and F Block Elements
Releted Question 1
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is