GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of-
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Sulphonates
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Nitrates
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Zeolites
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None of these
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Explanation:
Detailed explanation-1: -Permanent Hardness of Water: We can remove this hardness by treating the water with washing soda. Insoluble carbonates are formed when washing soda reacts with the sulphide and chloride salts of magnesium and calcium and thus, hard water is converted to soft water.
Detailed explanation-2: -Detailed Solution When Ca2+ and Mg2+ ions containing hard water is passes through a bed of sodium zeolite, the sodium ions are replace by the calcium and magnesium ions. Zeolite process is the best process to remove permanent hardness from the water.
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