Grade 11Physical Chemistry
Permanent hardness can be removed by use of a)na2co3 b) na6p6o18 c)naAlsiO4 d)all of these
1 Answer
Neelam Gusain
The answer to this question would be d). As Washing Powder (Na2CO3), Sodium Hexametaphosphate(Na6P6O18) and Sodium Aluminium silicate(NaAlSiO4) are successfully used to remove premanent hardness of water.
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