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      Question

      Irritation of eye due to cutting onion is due to

      presence of:
      A Benzoic acid Correct Answer Incorrect Answer
      B syn-propanethial-S-oxide Correct Answer Incorrect Answer
      C isothiocyanate Correct Answer Incorrect Answer
      D Disulphide Correct Answer Incorrect Answer
      E Sinigrin Correct Answer Incorrect Answer

      Solution

      Onions produce the chemical irritant known as syn-propanethial-S-oxide. It stimulates the eyes' lachrymal glands so they release tears.

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