JEE Main 202628 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 28 January
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- d and f Block Elements
JEE Main 2026 · 28 January · Morning Shift · Chemistry · d and f Block Elements
Given below are two statements: Statement I : The number of pairs,...
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{Cu}^{2+}, \mathrm{Zn}^{2+}\right]
Statement II: is the strongest reducing agent among and .
In the light of the above statements, choose the correct answer from the options given below
Statement I: The number of pairs, from the following, in which both the ions are coloured in aqueous solution is 3. \left[\mathrm{Cu}^{2+}, \mathrm{Zn}^{2+}\right]
Statement II: is the strongest reducing agent among and .
In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth Statement I and Statement II are false
- BBoth Statement I and Statement II are true
- CStatement I is false but Statement II is true
- DStatement I is true but Statement II is false
Correct answer
A. Both Statement I and Statement II are false
Step-by-step 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.
[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.