1.

The compounds (s) which generated (s) N_2 gas upon thermal decomposition below 300^(@)C is (are)

Answer»

`NH_(4)NO_(3)`
`(NH_(4))_(2)Cr_(2)O_(7)`
`Ba(N_(3))_(2)`
`Mg_(3)N_(2)`

Solution :(a) `NH_(4) NO_(3) overset(Delta)underset("below" 300^(@)C)to N_(2)O + 2H_(2)O`
`(b) (NH_(4))_(2) Cr_(2)O_(7) overset(Delta)to N_(2)+ Cr_(2)O_(3) + 4H_(2)O`
`(c) Ba(N_(3))_(2) overset(Delta)to Ba+ 3N_(2)`
(d) `Mg_(3)N_(2) ` (it does not decompose into `N_(2)`)


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