The disperse phase in colloidal iron (III) hy | vedclass

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(C) The iron $(III)$ hydroxide sol is positively charged,while the gold sol is negatively charged.$(A)$ According to the Hardy-Schulze rule,the coagul

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Mixing the sols has no effect

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(C) The iron $(III)$ hydroxide sol is positively charged,while the gold sol is negatively charged.$(A)$ According to the Hardy-Schulze rule,the coagulating power of an ion is directly proportional to its charge. For the negatively charged gold sol,the coagulating power of cations $(Mg^{2+} > Na^+)$ is significant. For the positively charged iron $(III)$ hydroxide sol,the coagulating power of anions $(SO_4^{2-} > Cl^-)$ is significant. Magnesium chloride contains $Mg^{2+}$ ions,which are effective for the gold sol,but not for the iron $(III)$ hydroxide sol. Thus,the statement is correct.$(B)$ Sodium sulphate $(Na_2SO_4)$ provides $Na^+$ ions (which coagulate the gold sol) and $SO_4^{2-}$ ions (which coagulate the iron $(III)$ hydroxide sol). Thus,the statement is correct.$(C)$ When two oppositely charged sols are mixed,they neutralize each other's charges,leading to mutual coagulation. Therefore,saying that mixing has no effect is incorrect.$(D)$ Electrophoresis involves the movement of charged colloidal particles under an electric field,which leads to their discharge and subsequent coagulation at the electrodes. Thus,the statement is correct.

List-$I$	List-$II$
$(A)$ Solid dispersed in liquid	$(I)$ Emulsion
$(B)$ Liquid dispersed in liquid	$(II)$ Foam
$(C)$ Gas dispersed in liquid	$(III)$ Gel
$(D)$ Liquid dispersed in solid	$(IV)$ Sol
-	$(V)$ Aerosol

The disperse phase in colloidal iron $(III)$ hydroxide and colloidal gold is positively and negatively charged,respectively. Which of the following statements is $NOT$ correct?

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