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`(NH_(4))_(2)Cr_(2)O_(7)(` Ammonium dichromate ) is used in fire works. The green coloured powder blown in air is

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`(NH_(4))_(2)Cr_(2)O_(7)(` Ammonium dichromate ) is used in fire works. The green coloured powder blown in air is
A. `Cr_(2)O_(3)`
B. `CrO_(2)`
C. `Cr_(2)O_(4)`
D. `CrO_(3)`
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Correct Answer - A
`(NH_(4))_(2)Cr_(2)O_(7)overset(Delta)(rarr)Cr_(2)O_(3)`
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