NEET UG CHEMISTRY MCQ: SURFACE CHEMISTRY

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Understanding +4 | -1

One desires to prepare a positively charged sol of silver iodide. This can be achieved by

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Correct option: B

Adding a little

\mathrm{KI}

solution to

\mathrm{AgNO}_3

solution in slight excess

Option B (Adding a little

\mathrm{KI}

solution to

\mathrm{AgNO}_3

solution in slight excess) is correct because when

\mathrm{AgNO}_3

is in excess, it adsorbs

Ag^+

ions, leading to a positively charged sol.

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