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Question

Ammonium dichromate is used in some fire works. Then green colored powder blown in air is :

A
CrO3
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B
Cr2O3
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C
Cr
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D
CrO(O2)
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Solution

The correct option is C Cr2O3
(NH4)2Cr2O7Cr2O3(s)+N2(g)+4H2O(g)

Green coloured powder blown in the air is Cr2O3.

Hence, option B is correct.

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