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CBSE Class 10 Science Question 1 of 60

Solved 2022 Term 1 Question Paper CBSE Class 10 Science — Question 1

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Question 1

A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is:

  1. Grey, Ba2SO4
  2. Yellow, Ba(SO4)2
  3. White, BaSO4
  4. Pink, BaSO4
Answer

White, BaSO4

Reason — When sodium sulphate is reacted with barium chloride, a white ppt. of barium sulphate is produced.

Na2SO4 (aq) + BaCl2 (aq) ⟶ BaSO4 (s) + 2NaCl (aq)