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Question

Among the electrolytes, Na2SO4,CaCl2,Al2(SO4)3 and NH4Cl, the most effective coagulating agent for Sb2S3 solution is:

A
Na2SO4
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B
CaCl2
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C
Al2(SO4)3
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D
NH4Cl
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Solution

The correct option is B Al2(SO4)3
As2S3 is a negative solution. Higher is the valency of effective ion (i.e. positive ion), more is the coagulating power.

So, C is the correct option.

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