Blue litmus turns red in a solution of pH:

Correct answer: A. Below 7

  • A. Below 7
  • B. 7
  • C. Above 7
  • D. At all pH

Explanation

Blue litmus paper turns red under acidic conditions (pH of below 7)

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About Acids, Bases and Salts

Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.

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