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Karnataka Police Constable Acids, Bases and Salts — practice questions

Explore 2 free Acids, Bases and Salts questions in Karnataka Police Constable Science. Open each question or exercise to read its content, reference answers and available explanation.

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Acids, Bases and Salts questions and exercises with answers

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Bleaching powder contains _____ as the bleaching agent.Read the answer and worked solution →Which of the following salts gives an aqueous solution with pH less than 7?Read the answer and worked solution →

Worked practice questions

Bleaching powder contains _____ as the bleaching agent.

  1. Chlorine
  2. Bromine
  3. Iodine
  4. Hydrogen
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Correct answer: A. Chlorine

1. Bleaching powder is calcium oxychloride, Ca(OCl)Cl. 2. Its bleaching action comes from the chlorine it releases. 3. Hence the bleaching agent is chlorine. _Source: RRB Group D CEN-02/2018 PYQ, Q.29._

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Which of the following salts gives an aqueous solution with pH less than 7?

  1. Sodium carbonate
  2. Sodium chloride
  3. Sodium bicarbonate
  4. Ammonium chloride
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Correct answer: D. Ammonium chloride

1. A salt of a strong acid and a weak base gives an acidic solution. 2. Ammonium chloride comes from HCl (strong acid) and ammonia (weak base). 3. Its aqueous solution is therefore acidic, with pH less than 7. _Source: RRB Group D CEN-02/2018 PYQ, Q.52._

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