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GK QUESTION#3205

Which of the following statements is/are correct? I. Salts of a strong acid and weak base are acidic with pH value less than 7. II. When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium oxide.

  1. ANeither I nor II
  2. BBoth I and II
  3. COnly II
  4. DOnly ICorrect answer
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Answer

D. Only I

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Explanation

At 25°C, aqueous salts of a strong acid and a weak base generally give acidic solutions through cation hydrolysis. Electrolysis of brine in the chlor-alkali process produces sodium hydroxide, chlorine and hydrogen, not sodium oxide. Only statement I is correct.

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