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Formation of Complexes

Ammonium dich...

Question

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

A

C r O_{3}

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B

C r_{2} O_{3}

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C

C r

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D

C r O (O)_{2}

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Solution

The correct option is A $C r_{2} O_{3}$
$(N H_{4})_{2} C r_{2} O_{7} \to C r_{2} O_{3} + N_{2} + 4 H_{2} O$

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