Question

Study the following unbalanced redox reaction. Which one of the following choices represents the balanced redox equation? PbS + O2 → PbO + SO2

Answer 1

All options are as follow,

A. PbS + O2→ PbO + SO₂ 

B.   PbS + 2O₂→ PbO + 2SO₂ 

C.   2PbS + 2O₂→ 2PbO + 2SO₂ 

D.   2PbS + 3O₂→ 2PbO + 2SO₂ 

E.   3PbS + 3O2→ 2PbO + 2SO2

Option A is not balanced because the number of oxygen atoms are greater at right hand side.

Option B is not balanced because the number of oxygen are less at right hand side and number of sulfur atoms are greater at right hand side.

Option C is not balanced because the number of oxygen atoms are greater at right hand side.

Option D is Balanced, all elements are balanced at both sides.

Option E is not balanced because number of Lead and Sulfur atoms are greater at right hand side.

Result:
           Equation in Option D is balanced and correct answer.