From the reactions given below, identify (A), (D) respectively.
(A)+Zn→H2 gas
(A)+P4→PH3
(A)+NH4Cl→(D) gas
A
NH4Cl,CO2
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B
CO2NH4Cl
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C
NH3,NaOH
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D
NaOH,NH3
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Solution
The correct option is DNaOH,NH3 Sodium hydroxide rects with zinc to form sodium zincate and hydrogen gas. 2NaOH(aq)+Zn→H2(g)+Na2ZnO2(A) Phosphorus reacts with aqueous sodium hydroxide solution to form sodium hupophosphite and phosphine. 3NaOH(aq)+P4+3H2OHeat−−−→3NaH2PO2+PH3(A) Sodium hydroxide reacts with ammonium chloride to form sodium chloride water and ammonia. NaOH(aq)+NH4ClHeat−−−→NaCl+H2O+NH3(g)(A)(D)