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The orange solid on heating gives a colo...

The orange solid on heating gives a colourless gas and a green solid which can be reduced to metal by aluminium powder. The orange and the green solids are, respectively -

A

`(NH_(4))_(2)Cr_(2)O_(7)` and `Cr_(2)O_(3)`

B

`Na_(2)Cr_(2)O_(7)` and `Cr_(2)O_(3)`

C

`K_(2)Cr_(2)O_(7)` and `CrO_(3)`

D

`(NH_(4))_(2)CrO_(4)` and `CrO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
`underset("orange")((NH_(4))_(2))Cr_(2)O_(7)overset(Delta)rarr underset("colourless green")(N_(2)uarr +Cr_(2)O_(3))+4H_(2)`
`Cr_(2)O_(3)+Al rarr 2Cr+Al_(2)O_(3)`
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -ENTRANCE QUESTION BANK
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