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Ammonium dichromate on heating liberates a gas. The same gas will be obtained by :

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Ammonium dichromate 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`

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Correct Answer - 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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