The arsenious sulphide solution has negative charge. Which of the following compounds has the maximum coagulating power for precipitating it?

0.1 N Z n (N O_{3})_{2}

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0.1 N N a_{3} P O_{4}

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0.1 N Z n S O_{4}

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0.1 N A l C l_{3}

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Solution

The correct option is D $0.1 N A l C l_{3}$
More is the $+$ ve charge of effective ion, greater is it's coagulating power. Here, concentration of all the compounds are same. So, $0.1 N A l C l_{3}$ will have maximum coagulating power because of the maximum positive charge, i.e., $+$ 3 on aluminium.

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Arsenous sulphide sol has negative charge. The maximum coagulating power for precipiatating it is of:

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