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The reaction involved during the removal...

The reaction involved during the removal of temporary hardness of water is

A

`Ca(HCO_(3))_(2)overset(Delta)toCaCO_(3)+H_(2)O+CO_(2)uarr`

B

`CaCl_(2)+Na_(2)CO_(3)toCaCO_(3)darr+2NaCl`

C

`MgSO_(4)+Na_(2)Al_(2)Si_(2)O_(8)xH_(2)O to MgAl_(2)Si_(2)O_(8)xH_(2)O+Na_(2)SO_(4)`

D

`2CaCl_(2)+(NaPO_(3))_(6)toNa_(2)[Ca_(2)(PO_(3))_(6)]+4NaCl`

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The correct Answer is:
A
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