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Section D (Assertion - Reason)
The following questions consist of two statements. Mark the answer as follows.
(a) If both statements are CORRECT, and Statement II is the CORRECT explanation of Statement I.
(b) If both statements are CORRECT, and Statement II is NOT the CORRECT explanation of Statement I.
(c) If Statement I is CORRECT, but Statement II is INCORRECT.
(d) If Statement I is INCORRECT, but Statement II is CORRECT.

Statement I: Isoelectric point is \( \mathrm{pH} \) at which colloids can move towards either of electrode.
Statement II: At isoelectric point, colloidal particles become electrically neutral.
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