निम्नलिखित में से कौन-सी अभिक्रिया कोलॉइड विलयन के निर्माण को आगे बढ़ाती है? (A) \( \mathrm{Cu}+...

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निम्नलिखित में से कौन-सी अभिक्रिया कोलॉइड विलयन के निर्माण को आगे बढ़ाती है?
(A) \( \mathrm{Cu}+\mathrm{HgCl}_{2} \longrightarrow \mathrm{CuCl}_{2}+\mathrm{Hg} \)
(B) \( 2 \mathrm{HNO}_{3}+3 \mathrm{H}_{2} \mathrm{~S} \longrightarrow 3 \mathrm{~S}+\mathrm{H}_{2} \mathrm{O}+2 \mathrm{NO} \)
(C) \( 2 \mathrm{Mg}+\mathrm{CO}_{2} \longrightarrow 2 \mathrm{MgO}+\mathrm{C} \)
(D) \( \mathrm{Cu}+\mathrm{CuCl} \longrightarrow 2 \mathrm{CuCl} \)
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