JEE Main 2026 — Chemistry Inorganic Chemistry

2026mcqhard

Given below are two statements:

Statement I: The number of pairs, from the following, in which both the ions are coloured in aqueous solution is 3. $\left[\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}\right],\left[\mathrm{Mn}^{2+}, \mathrm{Cr}^{2+}\right],\left[\mathrm{Cu}^{2+}, \mathrm{Zn}^{2+}\right]$ and $\left[\mathrm{Ni}^{2+}, \mathrm{Ti}^{4+}\right]$

Statement II: $\mathrm{Th}^{4+}$ is the strongest reducing agent among $\mathrm{Th}^{4+}, \mathrm{Ce}^{4+}, \mathrm{Gd}^{3+}$ and $\mathrm{Eu}^{2+}$ .

In the light of the above statements, choose the correct answer from the options given below

Official previous-year question

Held on 28 Jan 2026 · Verified 6 Jul 2026.

Options

A
Both Statement I and Statement II are false
B
Both Statement I and Statement II are true
C
Statement I is false but Statement II is true
D
Statement I is true but Statement II is false

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Solution

[Sc³⁺, Ti³⁺] has Sc³⁺ colorless (no d-electrons) and Ti³⁺ colored;

[Mn²⁺, Cr²⁺] has Mn²⁺ colorless (d⁵ half-filled, no d-d transitions) and Cr²⁺ colored;

[Cu²⁺, Zn²⁺] has Cu²⁺ colored and Zn²⁺ colorless (d¹⁰ filled);

[Ni²⁺, Ti⁴⁺] has Ni²⁺ colored and Ti⁴⁺ colorless (no d-electrons).

Zero pairs have both ions colored. Statement I is FALSE.

Th⁴⁺ is not a reducing agent. Statement II is FALSE.

Both statements are false.

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Solution

[Sc³⁺, Ti³⁺] has Sc³⁺ colorless (no d-electrons) and Ti³⁺ colored;

[Mn²⁺, Cr²⁺] has Mn²⁺ colorless (d⁵ half-filled, no d-d transitions) and Cr²⁺ colored;

[Cu²⁺, Zn²⁺] has Cu²⁺ colored and Zn²⁺ colorless (d¹⁰ filled);

[Ni²⁺, Ti⁴⁺] has Ni²⁺ colored and Ti⁴⁺ colorless (no d-electrons).

Zero pairs have both ions colored. Statement I is FALSE.

Th⁴⁺ is not a reducing agent. Statement II is FALSE.

Both statements are false.

JEE Main 2026 — Chemistry Inorganic Chemistry

Options

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Solution

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JEE Main Inorganic Chemistry in other years

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JEE Main 2026 — Chemistry Inorganic Chemistry

Options

Did you get this right?

Solution

Your note

JEE Main Inorganic Chemistry in other years

More JEE Main Inorganic Chemistry questions

Other Chemistry topics for JEE Main

Physical Chemistry

Organic Chemistry

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