JEE Main 2023 — Chemistry Physical Chemistry

2023mcqeasy

$25\mathrm{mL}$ of silver nitrate solution $(1M)$ is added dropwise to $25\mathrm{mL}$ of potassium iodide $(1.05M)$ solution. The ion(s) present in very small quantity in the solution is/are

Official previous-year question

Held on 11 Apr 2023 · Verified 6 Jul 2026.

Options

A
${I}^{-}$ only
B
${K}^{+}$ only
C
${\mathrm{NO}}_{3}^{-}$ only
D
${\mathrm{Ag}}^{+}$ and ${I}^{-}$ both

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Solution

To determine the ion(s) present in very small quantity in the solution, we need to consider the chemical reaction that occurs when silver nitrate reacts with potassium iodide. The reaction between ${\mathrm{AgNO}}_{3}$ and $\mathrm{KI}$ is a double replacement reaction and can be represented as follows:

${\mathrm{AgNO}}_{3}+\mathrm{KI}\rightarrow \mathrm{AgI}+{\mathrm{KNO}}_{3}$

Millimoles of ${\mathrm{AgNO}}_{3}=25$

Millimoles of $\mathrm{KI}=25\times 1.05=26.25$

$\therefore \mathrm{KI}$ is in excess & $\mathrm{AgI}$ forms negatively charged colloid. (Some ${\mathrm{Ag}}^{+}$ remains in solution) lons ${\mathrm{Ag}}^{+}$ & ${F}^{-}$ are therefore, present in very small quantity.

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JEE Main Physical Chemistry in other years

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JEE Main 2023 — Chemistry Physical Chemistry

2023mcqeasy

$25\mathrm{mL}$ of silver nitrate solution $(1M)$ is added dropwise to $25\mathrm{mL}$ of potassium iodide $(1.05M)$ solution. The ion(s) present in very small quantity in the solution is/are

Official previous-year question

Held on 11 Apr 2023 · Verified 6 Jul 2026.

Options

A
${I}^{-}$ only
B
${K}^{+}$ only
C
${\mathrm{NO}}_{3}^{-}$ only
D
${\mathrm{Ag}}^{+}$ and ${I}^{-}$ both

Did you get this right?

Solution

${\mathrm{AgNO}}_{3}+\mathrm{KI}\rightarrow \mathrm{AgI}+{\mathrm{KNO}}_{3}$

Millimoles of ${\mathrm{AgNO}}_{3}=25$

Millimoles of $\mathrm{KI}=25\times 1.05=26.25$

Your note

JEE Main Physical Chemistry in other years

Keep practicing Physical Chemistry

Work through every JEE Main Physical Chemistry PYQ, year by year.

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JEE Main 2023 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

Your note

JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

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JEE Main 2023 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

Your note

JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

Other Chemistry topics for JEE Main

Organic Chemistry

Inorganic Chemistry

Keep practicing Physical Chemistry