Question

1 mole of PbS is oxidised by “X” moles of O3>to get “Y” moles of O2. X + Y = __________

Answer 1

The balanced chemical equation for the oxidation of PbS by ozone is:

$\text{PbS} + 4\text{O}_3 \rightarrow \text{PbSO}_4 + 4\text{O}_2$

From the equation:
- 1 mole of PbS reacts with 4 moles of $\text{O}_3$, so $X = 4$.
- 4 moles of $\text{O}_2$ are produced, so $Y = 4$.

Therefore:

$X + Y = 4 + 4 = 8$

The Correct answer is: 8