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GK QUESTION#3450

Consider the following statements about red-cabbage anthocyanin pigments.

1. They are pigments found in red cabbage.

2. They turn pink in alkaline substances and green in acidic substances.

Which statements are correct?

  1. AOnly 1Correct answer
  2. BOnly 2
  3. CBoth 1 and 2
  4. DNeither 1 nor 2
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Answer

A. Only 1

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Explanation

Red cabbage contains anthocyanin pigments, so statement 1 is correct. The pigments tend to appear red or pink under acidic conditions and blue, green or yellow under sufficiently alkaline conditions, depending on pH. Statement 2 reverses the acid and alkaline colour assignments and is false.

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