Chemistry PYQ 261 of 291 · Everyday Chemistry

Iodised salt contains:

  1. AFree iodine
  2. BCalcium iodide
  3. CMagnesium iodide
  4. DPotassium iodide
  5. ENone of the above/More than one of the above

60th–62nd BPSC Prelims 2016

Show answer and explanation

Correct answer: (d) Potassium iodide

Explanation

Iodised salt is common salt with a little potassium iodide (KI) or potassium iodate (KIO₃) added; India uses mainly potassium iodate.

Iodine is needed to make the thyroid hormones, and too little causes goitre.

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