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JEE Main levelSingle correct optionDifficulty 2 of 3sc127

In an electrophoresis experiment with a $Fe (OH) X_{3}$ sol in one U-tube and a gold sol in another U-tube, the colloidal particles migrate towards

Athe anode in the first tube and the cathode in the second
Bthe cathode in both tubes
Cthe cathode in the first tube and the anode in the second
Dthe anode in both tubes

Answer: C

The

Fe (OH) X_{3}

sol is positively charged, so its particles move to the cathode. The gold sol is negatively charged, so its particles move to the anode.

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