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GK QUESTION#3217

Assertion (A): Clove oil can be used as an olfactory indicator in acid-base reactions. Reason (R): Olfactory indicators show a change in colour when mixed with acids or bases.

  1. ABoth A and R are true, and R is the correct explanation of A.
  2. BBoth A and R are true, but R is not the correct explanation of A.
  3. CA is false, but R is true.
  4. DA is true, but R is falseCorrect answer
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Answer

D. A is true, but R is false

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Explanation

Clove oil can serve as an olfactory indicator because its perceived odour differs in acidic and basic media. Olfactory indicators are identified by odour, not by a defining colour change. The assertion is true and the reason is false.

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