Q56 / 180 · AIIMS 2019 (26 May) · Chemistry

Assertion : $\mathrm{I}_2 \mathrm{O}_5$ is used to detect CO. Reason : In $\mathrm{I}_2 \mathrm{O}_5$, the oxidation number of I is +5 .

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • Correct answer
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

$\begin{aligned} & \text { } \mathrm{I}_2 \mathrm{O}_5+5 \mathrm{CO} \longrightarrow \mathrm{I}_2+5 \mathrm{CO}_2 \\ & \mathrm{I}_2+2 \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3 \longrightarrow \mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6+2 \mathrm{NaI}\end{aligned}$

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

Relevant Questions