MCQEasy1 mark
1
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
Which gas decolourises potassium permanganate (KMnO₄) solution?
Topic: Organic compounds: nomenclature, structure and reactions
Previous-year question practice database
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Pick an option and check your answer. The full worked answer is below either way.
Answer
Exam answer
(a) Sulphur dioxide (SO₂).
Explanation
SO₂ is a reducing gas and decolourises acidified KMnO₄.
In words
Sulphur dioxide (SO₂).
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