d-block and f-block Elements — Practice Quiz
Telangana Open School (TOSS) · Class 12 · Chemistry
Try a 4-question quiz on d-block and f-block Elements for Telangana Open School (TOSS) Class 12 Chemistry: tap an answer to check it and see why.
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Quick Quiz: d-block and f-block Elements
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Which of the following best defines a transition element?
Which of the following is NOT a transition element?
Which element marks the beginning of the first transition series?
Which of the following elements has the electronic configuration [Ar] 3d⁵ 4s¹?
Sample Questions
Which of the following is a characteristic property of transition elements?
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They exhibit variable oxidation states
Variable oxidation states are a characteristic property of transition elements due to the similar energies of (n-1)d and ns orbitals, allowing both to participate in bonding.
What is the most common oxidation state of 3d elements after scandium?
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+2
After scandium, the most common oxidation state of 3d elements is +2, which arises from the loss of two 4s electrons.
Which of the following ions is diamagnetic?
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Sc³⁺
Sc³⁺ has the electronic configuration 3d⁰, meaning it has no unpaired electrons and is therefore diamagnetic.
What is the color of aqueous Cu²⁺ ions?
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Blue
Aqueous Cu²⁺ ions are blue in color due to d-d transitions in the partially filled d-orbitals.
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