An orange solid (A) on heating gave a green residue (B), a colourless gas (C ) and water vapours. The dry gas (C ) when passed over heated magnesium,
An orange solid (A) on heating gave a green residue (B), a colourless gas (C ) and water vapours. The dry gas (C ) when passed over heated magnesium, gave a white solid (D) which evolved a gas (E ) on reacting with water. The gas formed dense white fumes with HCl. Identify all the compounds from A to E. Give the reactions involved.
The green residue (B) has the formula
A. `CrO_(5)`
B. `CrO_(3)`
C. `Cr_(2)O_(5)`
D. `CrO_(2)`
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Correct Answer - C
`(NH_(4))_(2)underset((A))(Cr_(2)O_(7)) overset("heat")to underset((B))(Cr_(2)O_(3))+underset((C )) (N_(2))+4H_(2)O`
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