JEE Main · 2023 · Shift-IeasyPB12-036

An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is:

p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question

Question

Options

a
$\mathrm{Cu^{2+}}$
b
$\mathrm{Ni^{2+}}$
✓
c
$\mathrm{Fe^{2+}}$
d
$\mathrm{Co^{2+}}$

Correct Answerb

$\mathrm{Ni^{2+}}$

Detailed Solution

Strategy: Match the noble gas species with their characteristic shapes.

Step 1: Structural Matching

$\ce{XeF4}$ : Square Planar.
$\ce{XeOF4}$ : Square Pyramidal.
$\ce{XeF2}$ : Linear.
$\ce{XeO3}$ : Pyramidal.

Step 2: Conclusion Selecting the option that correctly pairs each species with its shape gives the answer.

$\boxed{\text{Answer: (Option) [b] [Correct matching set]}}$

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