MCQ
What is/are true about $CO_2$ and $SO_2$
- ✓Both turn acidified $K_2Cr_2O_7$ solution green
- BBoth turn lime water milky
- CBoth ore oxidising aqests nor the reducing agents
- DAll of these
✓
Answer
Correct option: A.
Both turn acidified $K_2Cr_2O_7$ solution green
a
$K _{2} Cr _{2} O _{7}$ being a strong oxidizing agent easily oxidizes $SO _{3}^{-2}$ to $SO_{4}^{-2} .$ The reaction is shown below.
$K _{2} Cr _{2} O _{7}$ being a strong oxidizing agent easily oxidizes $SO _{3}^{-2}$ to $SO_{4}^{-2} .$ The reaction is shown below.
$K _{2} Cr _{2} O _{7}+ SO _{3}^{-2} \rightarrow Cr ^{3+}+ SO _{4}^{-2}$
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