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Ammonia gas can evolve by heating :...

Ammonia gas can evolve by heating :

A

`NaNO_3` with zinc dust and sodium hydroxide

B

`NaNO_2` with dil `HNO_3`

C

dry `(NH_4)_2Cr_2O_7`

D

ammonium chloride with lime water

Text Solution

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The correct Answer is:
A,D
(A)`NO_2^(-)+7[H]overset(Zn//NaOH)toNH_3 +2H_2O, NO_3^(-)+9[H]overset(Zn//NaOH)(NH_3)+3H_2O`
(B)`CaCN_2 + 3H_2O to CaCO_3 + 2NH_3`
(C )`(NH_4)_2Cr_2O_7 to N_2 + Cr_2O_3 + 4H_2O , NH_4NO_3 to N_2O + 2H_2O`
(D)`NH_2Cl + Ca(OH)_2 to 2NH_3 +CaCl_2 + 2H_2O`
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