Related Practice Questions :

Permutit is:

(a) hydrated sodium aluminium silicate

(b) sodium hexa meta-phosphate

(c) sodium silicate

(d) sodium meta-aluminate

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When zeolites, (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchanged with:

(a) H+ ion

(b) Ca2+ ion

(c) SO42- ion

(d) OH- ion

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Temporary hardness is caused due to the presence of:

(a) CaSO4

(b) CaCl2

(c) CaCO3

(d) Ca(HCO3)2

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Which method cannot be used to remove hardness of water ?

(a) Clark's method

(b) By adding washing soda

(c) Calgon process

(d) Filtration

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Which salt does not cause hardness of water ?

(1) Mg(HCO3)2

(2) CaCl2

(3) MgSO4

(4) MgCO3

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