Q30 / 160 · AP EAMCET 2022 (06 Jul Shift 1) · Chemistry

Which of the following source materials generate $\mathrm{SO}_2$ that is used in contact process?

  • Correct answer
    A
    $\mathrm{S}, \mathrm{FeS}_2$
  • B
    $\mathrm{S}, \mathrm{FeS}$
  • C
    $\mathrm{H}_2 \mathrm{~S}, \mathrm{FeS}_2$
  • D
    $\mathrm{Na}_2 \mathrm{~S}, \mathrm{FeS}_2$

Solution

Preparation of $\mathrm{H}_2 \mathrm{SO}_4$ from iron pyrite $\left(\mathrm{FeS}_2\right)$ : $\mathrm{FeS}_2+\mathrm{O}_2 \rightarrow \mathrm{Fe}_2 \mathrm{O}_3+\mathrm{SO}_2$ and from $\mathrm{S}: \mathrm{S}+\mathrm{O}_2 \rightarrow \mathrm{SO}_2$

Hence, the correct answer is option: 'A'.

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