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(NH(4))(2)Cr(2)O(7) on heating gives a g...

`(NH_(4))_(2)Cr_(2)O_(7)` on heating gives a gas which is also given by :

A

heating `NH_(4)NO_(2)`

B

heating `NH_(4)NO_(3)`

C

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

D

treatment `Mg_(3)N_(2)` with `H_(2)O`

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The correct Answer is:
A
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