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Question
Which of the following gases have bleaching effect on a substance?
Options
Ammonia
Carbon dioxide
Sulphur dioxide
Both Carbon dioxide and Sulphur dioxide
MCQ
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Solution
Sulphur dioxide
Explanation:
SO2 acts as a temporary bleaching agent in the presence of moisture through the process of reduction.
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Chapter 13: Practical Work - Intext Question [Page 273]
