d-Block, f-Block Elements & Coordination Compounds — Hard Difficulty

Practice 100 questions on d-Block, f-Block Elements & Coordination Compounds — Hard Difficulty. Includes: **Assertion (A):** KMnO₄ acts as a stronger oxidizing…; **Assertion (A):** The colour of [Ti(H₂O)₆]³⁺ is…; Consider the following statements: **Assertion (A):**…. Free quiz on NoteTube.

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1.
**Assertion (A):** The complex [Cr($H_{2}O$)_{6}]^{3+} absorbs light at longer wavelengths than [Cr(CN)_{6}]^{3-}. **Reason (R):** $H_{2}O$ is a weaker field ligand than $CN^{-}$, producing a smaller $\Delta$ₒ, so lower energy (longer wavelength) light is required.
2.
**Assertion (A):** The complex ion [Co(en)_{3}]^{3+} shows optical isomerism. **Reason (R):** [Co(en)_{3}]^{3+} has no plane of symmetry, centre of symmetry, or improper axis of rotation.
3.
The crystal field stabilization energy (CFSE) for $d^{5}$ HIGH spin in octahedral field equals:
4.
A metal M forms a complex [M(en)_{2}$Cl_{2}$]^{+}. The complex shows BOTH geometrical and optical isomerism. Based on this, M must be:
5.
Consider the following statements: **Assertion (A):** [Co($NH_{3}$)_{6}]^{3+} is diamagnetic while [$CoF_{6}$]^{3-} is paramagnetic. **Reason (R):** $NH_{3}$ is a stronger field ligand than $F^{-}$, causing electron pairing in [Co($NH_{3}$)_{6}]^{3+}.

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