Amongst the following which is/are corr...

Amongst the following which is/are correct statement about the metal sulphide sols ?

A

the sol particles are positively charged due to preferential adsorption of metal ions

B

the sol partcles are negatively charged due to preferntial adsorption of sulphide ions

C

the cations of added electrolytes are effective in causing the coagulation of the sol

D

the sol is due to both the electric charge and hydration of the particles

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The correct Answer is:

b,c

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