Transition and Inner transition Elements — Important Questions
Maharashtra Board · Class 12 · Chemistry
44 important questions from Transition and Inner transition Elements for Maharashtra Board Class 12 Chemistry, with answers.
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Important Questions from Transition and Inner transition Elements
Which of the following properties are characteristic of transition metals? (Select all correct answers)
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High melting points, Colored compounds, Catalytic activity
Transition metals have high melting points due to metallic bonding, form colored compounds due to d-d transitions, and show catalytic activity due to variable oxidation states. They are good electrical conductors.
In the extraction of iron from hematite ore, limestone acts as:
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Flux
Limestone (CaCO₃) decomposes to CaO which combines with silica gangue to form calcium silicate slag, thus acting as flux to remove impurities.
Which of the following ions is diamagnetic?
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Sc³⁺
Sc³⁺ has electronic configuration [Ar] 3d⁰ with no unpaired electrons, making it diamagnetic. All other ions have unpaired electrons and are paramagnetic.
The general electronic configuration of lanthanoids is:
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[Xe] 4f¹⁻¹⁴ 5d⁰⁻² 6s²
Lanthanoids have 4f orbitals being filled progressively from Ce to Lu, with general configuration [Xe] 4f¹⁻¹⁴ 5d⁰⁻² 6s².
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