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Question

An arsenious sulphide sol carries a negative charge. The maximum precipitating power of this sol is possessed by :

A
K2SO4
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B
CaCl2
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C
Na3PO4
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D
AlCl3
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Solution

The correct option is C AlCl3
AlCl3(=Al+3) gives cations with maximum charge and so, it have maximum precipitating power.

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