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Ammonia gas is not prepared by :...

Ammonia gas is not prepared by :

A

reduction of sodium nitrite or sodium nitrate by the reaction of zinc dust and sodium hydroxide

B

hydrolysis of calcium cyanamide

C

heating ammonium chloride with slaked lime

D

heating of `(NH_4)_2 Cr_2O_7`

Text Solution

Verified by Experts

The correct Answer is:
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_4Cl+Ca(OH)_2 to 2NH_3 + CaCl_2 + 2H_2O`
(D)`(NH_4)_2Cr_2O_7 to N_2+Cr_2O_3 + 4H_2O`
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