Which of the following will have the highest coagulation power for As2S3 collide?
A
PO3−4
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B
SO2−4
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C
Al3+
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D
Na+
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Solution
The correct option is AAl3+
Al3+ has the highest coagulating power because the given As2S3 sol solution is a negatively charged sol which can be coagulated easily by more positively charged species.