Post-UTME Chemistry 2015 Objective — Question 10
Question 10 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2015 Objective paper, with the correct answer and a full explanation.
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The bleaching action of Sulphur (IV) oxide differs from that of chlorine in that
- A. Sulphur (IV) oxide bleaches by oxidation while chlorine bleaches by reduction
- B. Sulphur (IV) oxide bleaches by reduction while chlorine bleaches by oxidationCorrect
- C. Sulphur (IV) oxide is insoluble in water and is much milder in action than chlorine
- D. bleaching by Sulphur (IV) oxide is permanent
Explanation
SO2 bleaches by reduction, while chlorine bleaches by oxidation - and SO2's bleaching effect is typically temporary/reversible, unlike chlorine's.
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