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ICSE Class 9 Chemistry Question 3 of 24

Model Question Paper — 1 — Question 8

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8
Question

Question 1(viii)

Which of the following will produce water vapour on heating?

  1. Potassium chloride crystals
  2. Sodium chloride crystals
  3. Sodium nitrate crystals
  4. Washing soda crystals
Answer

Washing soda crystals

Reason — Washing soda crystals (Na2CO3.10H2O) contain water of crystallisation. On heating, it is given off as water vapour.