Multiple choice

Crystals of hydrated sodium carbonate are exposed to air to obtain crumble fine powder. This fine powder is called as:

  1. efflorescence

  2. glauber salts

  3. sodium sesquecarbonate

  4. water glass

  5. None of these
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A Correct answer
Explanation

This option is correct because the crystal of sodium carbonate are exposed to air to form a fine powder in which nine water molecules are exposed to air. It gives monohydrated sodium carbonate. These types of crystal are called as efflorescence.

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