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[" Question No ."34],[" Pure "N(2)" gas ...

[" Question No ."34],[" Pure "N_(2)" gas is obtained from "],[" (A) "NH_(3)+NaNO_(2)],[" (B) "Ba(N_(3))_(2)],[" (C) "N_(2)O+Cu],[" (D) "(NH_(4))_(2)Cr_(2)O_(7)],[" A "]

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(NH_(4))_(2)Cr_(2)O_(7) overset("heat") to

Assertion : Pure N_(2) is obtained from Ba(N_(3))_(2) but not from (NH_(4))_(2)Cr_(2)O_(7) Reason : On decomposition (NH_(4))_(2)Cr_(2)O_(7) gives O_(2) gas.

Assertion : Pure N_(2) is obtained from Ba(N_(3))_(2) but not from (NH_(4))_(2)Cr_(2)O_(7) Reason : On decomposition (NH_(4))_(2)Cr_(2)O_(7) gives O_(2) gas.

The conjugate base of hydrazoic acid is (A) N^(3-) (B) N_(3) ^(-) (C) NH_(2) ^(-) (D) (NH_(4))^(+)

The gas evolved on heating (NH_(4))_(2)Cr_(2)O_(7) is :