From the following sol how many can coagulate the haemoglobin sol?Fe(OH)3,Ca(OH)2,Al(OH)3, starch, clay, As2S3,CdSbasic dye.

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answer is 4.

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Detailed Solution

Haemoglobin is positively charged sol. Hence the sol with negative charge can coagulate haemoglobin, i.e., starch, clay,As2S3, CdS.

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