Question

Consider the following reaction:
Here, A, B, C and D respectively are:
A. A = Conc. HCl; B = Fe; C = NH4OH; D = PbO
B. A = Conc. H2SO4; B = Fe; C = NH4OH; D = Pb(NO3)2
C. A = Conc. H2SO4; B = Fe; C = NH3; D= Pb(NO3)2
D. A = Conc. HCl; B = Fe; C = NH3; D =PbO

Answer 1

Answer:

option c is correct answer

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Explanation:

Answer 2

B) A = Conc. H₂SO₄; B = Fe; C = NH₄OH; D = Pb(NO₃)₂

Sodium Chloride(NaCl) on reaction with conc H₂SO₄ gives HCl according to the following reaction:

NaCl + H₂SO₄     →      HCl↑   + NaHSO₄

HCl gas is produced as a by-product in the reaction.

HCl on reaction with Iron(Fe) produces FeCl₂ as hydrogen in HCl is displaced by Fe. Fe is more reactive than hydrogen and is above H in the reactivity series. This is an example of a displacement reaction.

2HCl        +    Fe      →        FeCl₂        + H₂↑

HCl on reaction with Ammonium hydroxide [NH₄OH] forms Ammonium chloride NH₄Cl and water. HCl is acid and NH₄OH is a base. The acid and base react to form salt and water. This is an example of a neutralization reaction.

HCl     +        NH₄OH       →           NH₄Cl          +     H₂O

HCl on reaction with Lead nitrate Pb(NO₃)₂ forms Lead chloride PbCl₂ and Nitric acid HNO₃. Lead displaces hydrogen from HCl and H displaces Lead from Pb(NO₃)₂. This is an example of a double displacement reaction.

2HCl    +         Pb(NO₃)₂          →            PbCl₂       +        2 HNO₃