Question:
Select incorrect statements.
(A) Ionisation energies of 5d-elements are greater than those of 3d and 4d elements.
(B) Cu(I) is diamagnetic while Cu(II) is paramagnetic.
(C) [Ti(H\(_2\)O)\(_6\)]\(^{3+}\) is colored while [Sc(H\(_2\)O)\(_6\)]\(^+\) is colourless.
(D) Transition elements cannot form complexes.
Select incorrect statements.
(A) Ionisation energies of 5d-elements are greater than those of 3d and 4d elements.
(B) Cu(I) is diamagnetic while Cu(II) is paramagnetic.
(C) [Ti(H\(_2\)O)\(_6\)]\(^{3+}\) is colored while [Sc(H\(_2\)O)\(_6\)]\(^+\) is colourless.
(D) Transition elements cannot form complexes.
(A) Ionisation energies of 5d-elements are greater than those of 3d and 4d elements.
(B) Cu(I) is diamagnetic while Cu(II) is paramagnetic.
(C) [Ti(H\(_2\)O)\(_6\)]\(^{3+}\) is colored while [Sc(H\(_2\)O)\(_6\)]\(^+\) is colourless.
(D) Transition elements cannot form complexes.
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Transition metals commonly form complexes due to availability of vacant d-orbitals.
Updated On: Apr 23, 2026
- only (A)
- only (B) and (C)
- only (D)
- only (A) and (D)
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Identify incorrect statements among the given options.
Step 2: Detailed Explanation:
(A) Incorrect - Ionisation energies do not always strictly increase from 3d to 5d in a simple manner.
(B) Correct - Cu\(^+\) (3d\(^{10}\)) is diamagnetic; Cu\(^{2+}\) (3d\(^9\)) is paramagnetic.
(C) Correct - Ti\(^{3+}\) shows colour due to d–d transition, while Sc\(^{3+}\) is colourless.
(D) Incorrect - Transition elements can form complexes, so this statement is wrong.
Step 3: Final Answer:
Thus, incorrect statements are (A) and (D).
Identify incorrect statements among the given options.
Step 2: Detailed Explanation:
(A) Incorrect - Ionisation energies do not always strictly increase from 3d to 5d in a simple manner.
(B) Correct - Cu\(^+\) (3d\(^{10}\)) is diamagnetic; Cu\(^{2+}\) (3d\(^9\)) is paramagnetic.
(C) Correct - Ti\(^{3+}\) shows colour due to d–d transition, while Sc\(^{3+}\) is colourless.
(D) Incorrect - Transition elements can form complexes, so this statement is wrong.
Step 3: Final Answer:
Thus, incorrect statements are (A) and (D).
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