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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 `Mg_(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(Delta)toN_(2) uarr + Cr_(2)O_(3) + 4H_(2)O`
`NH_(4) NO_(2) overset(Delta)to N_(2) uarr + 2H_(2)O`
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