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Given below are two statements: Statement I: On heating with KHSO4, glycerol is dehydrated and acrolein is formed. Statement II: Acrolein has fruity odour and can be used to test glycerol’s presence. Choose the correct option. (1) Both Statement I and Statement II are correct. (2) Both Statement I and Statement II are incorrect. (3) Statement I is correct but Statement II is incorrect. (4) Statement I is incorrect but Statement II is correct.

1. (1) Both Statement I and Statement II are correct.
2. (2) Both Statement I and Statement II are incorrect.
3. (3) Statement I is correct but Statement II is incorrect.
4. (4) Statement I is incorrect but Statement II is correct.

Correct answer: (4) Statement I is incorrect but Statement II is correct.

Solution

Statement I is incorrect because glycerol does not dehydrate to form acrolein when heated with KHSO4; instead, it typically requires stronger conditions. However, Statement II is correct as acrolein does have a fruity odor and can indeed be used to indicate the presence of glycerol.

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