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(NH4)2Cr2O7 on heating liberates a gas. ...

`(NH_4)_2Cr_2O_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 `Mg_3 N_2` with ` H_2 O`

D

Heating ` H_2 O_2` on` NaNO_2`

Text Solution

Verified by Experts

The correct Answer is:
A
The reactions involved are
`(NH_4)_2 Cr_2 O_7 overset(Delta )to N_2 + Cr_2 O_3 + 4 H_2 O`
`NH_4 NO_2 to N_2 +2H_2 O`
Both evolve `N_2 ` gas
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