Which of the following compounds is used for water softening?
(i) Ca3(PO4)2
(ii) Na3PO4
(iii) Na6P6O18
(iv) Na2HPO4
Which of the following compounds is used for water softening?
(i) Ca3(PO4)2
(ii) Na3PO4
(iii) Na6P6O18
(iv) Na2HPO4
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1 Answer
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This is a multiple choice answer as classified in NCERT Exemplar
Option (iii)
Na6P6O18
Sodium hexametaphosphate (Na6P6O18), commercially called ‘calgon’, is used to remove hardness from water.
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HI
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