Transition and InnerTransition Elements - Result Question 136

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

(1997, 1M)

(a) $CrO _3$

(b) $Cr _2 O _3$

(c) $Cr$

(d) $CO$

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Solution:

  1. Ammonium dichromate $\left[\left(NH _4\right) _2 Cr _2 O _7\right]$ on heating decomposes producing green powder of $Cr _2 O _3$ and $N _2(g)$ is evolved.


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