Multiple choice

Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of

  1. nitrates
  2. zeolites
  3. sulphonates

  1. Only 1

  2. Only 2

  3. Only 1 and 2

  4. Only 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Permanent hardness of water, due to sulphates of the metal, can be destroyed by use of zeolites. Zeolites are hydrated sodium alumino silicate minerals which destroy the calcium and magnesium sulphates in the water.

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