The method used to remove temporary hardness of water is:

Calgon method

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Clark's method

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Ion-exchange method

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Synthetic resins method

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Solution

The correct option is B Clark's method
Clark's method is used to remove temporary hardness of water, in which bicarbonates of calcium and magnesium are reacted with slaked lime $C a (O H)_{2}$

$C a (H C O_{3})_{2} + C a (O H)_{2} ⟶ 2 C a C O_{3} ↓ + H_{2} O$

$M g (H C O_{3})_{2} + C a (O H)_{2} ⟶ C a C O_{3} ↓ + M g C O_{3} ↓ + 2 H_{2} O$

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The temporary hardness of water can be removed by Clark's Method using _____.

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