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Permanent hardness can be removed by use of a)na2co3 b) na6p6o18 c)naAlsiO4 d)all of these

Permanent hardness can be removed by use of a)na2co3 b) na6p6o18 c)naAlsiO4 d)all of these

Grade:11

1 Answers

Neelam Gusain
25 Points
6 years ago
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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