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(NH(4))(2)Cr(2)O(7) on heating liberate...

`(NH_(4))_(2)Cr_(2)O_(7)` on heating liberates a gas. The same gas will be obtained by

A

heating `NH_(4)NO_(2)`

B

heating `NH_(4)NO_(3)`

C

treating `H_(2)O_(2)` with `NaNO_(2)`

D

treating `Ma_(3)N_(2)` with `H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
A
`(NH_(4))_(2)Cr_(2)O_(7)overset("heat")(rarr)N_(2)+Cr_(2)O_(3)+4H_(2)O`
`NH_(4)NO_(2)rarrN_(2)+2H_(2)O ("Same gas i.e., "N_(2))`
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