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

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Ammonium dichromate is used in some fireworks. The green-coloured powder blown in the air is
A. `CrO_(3)`
B. `Cr_(2)O_(3)`
C. `Cr`
D. `CrO(O_(2))`
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Correct Answer - B
`(NH_(4))_(2)Cr_(2)O_(7)toN_(2)+Cr_(2)O_(3)+4H_(2)O`.
Green coloured powder blown in air is `Cr_(2)O_(3)`.
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