The Permanent hardness of water can be removed by adding

Options :
  1. Sodium Sulphate
  2. Magnesium Sulphate
  3. Sodium Carbonate
  4. Zinc Oxide
Answer and Explanation :-

Answer: Option 3

Explanation:

( Sodium Carbonate is also known as Washing soda. It is soluble in nature)

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But if the gods do not exist at all - then we are lost,' I said.On the contrary - we are found!' said Aesop.But when we are afraid, who can we turn to, if not the gods?'Ourselves. We turn to ourselves anyway. We only pretend there are gods and that they care about us. It is a comforting falsehood.
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