Chapter 4: The d-and f-Block Elements MCQs | chemistry Class 12 CBSE

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Question 1

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According to IUPAC definition, which of the following is NOT a transition metal?

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Question 2

Objective

The electronic configuration of Cr (Z=24) is:

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Question 3

Objective

Which of the following transition metal ions has the highest number of unpaired electrons?

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Question 4

Objective

The spin-only magnetic moment of a divalent ion with atomic number 25 is:

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Question 5

Objective

In the preparation of K2Cr2O7, chromite ore is fused with Na2CO3 in presence of air. The initial product of fusion is:

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Question 6

Objective

Which transition element exhibits the largest number of oxidation states in the first transition series?

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Question 7

Objective

Lanthanoid contraction is caused by:

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Question 8

Objective

The standard electrode potential E°(M²⁺/M) for copper is +0.34 V. This means copper:

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Question 9

Objective

The colour of KMnO4 crystals is:

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Question 10

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Which of the following ions is colourless in aqueous solution?

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Question 11

Objective

The oxidation state of Mn in KMnO4 is:

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Question 12

Objective

Which of the following pairs have nearly identical atomic radii due to lanthanoid contraction?

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Question 13

Objective

The interconversion of chromate to dichromate occurs by changing the pH of the solution. When alkali is added to K2Cr2O7 solution, the colour change observed is:

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Question 14

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Cr²⁺ is a strong reducing agent while Mn³⁺ is a strong oxidising agent, even though both have d⁴ configuration. The correct explanation is:

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Question 15

Objective

In potassium permanganate (KMnO4), the structure of the permanganate ion is:

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Question 16

Objective

Which of the following is an interstitial compound?

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Question 17

Objective

The general electronic configuration of transition elements is:

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Question 18

Objective

The reducing power order in aqueous solution among Ti²⁺, V²⁺ and Cr²⁺ in the first transition series is such that all three can:

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Question 19

Objective

In the reaction of KMnO4 with Fe²⁺ in acidic solution, the Mn is reduced to:

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Question 20

Objective

Which property is NOT generally exhibited by transition metals?

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Chapter 4: The d-and f-Block Elements | MCQs

According to IUPAC definition, which of the following is NOT a transition metal?

The electronic configuration of Cr (Z=24) is:

Which of the following transition metal ions has the highest number of unpaired electrons?

The spin-only magnetic moment of a divalent ion with atomic number 25 is:

In the preparation of K2Cr2O7, chromite ore is fused with Na2CO3 in presence of air. The initial product of fusion is:

Which transition element exhibits the largest number of oxidation states in the first transition series?

Lanthanoid contraction is caused by:

The standard electrode potential E°(M²⁺/M) for copper is +0.34 V. This means copper:

The colour of KMnO4 crystals is:

Which of the following ions is colourless in aqueous solution?

The oxidation state of Mn in KMnO4 is:

Which of the following pairs have nearly identical atomic radii due to lanthanoid contraction?

The interconversion of chromate to dichromate occurs by changing the pH of the solution. When alkali is added to K2Cr2O7 solution, the colour change observed is:

Cr²⁺ is a strong reducing agent while Mn³⁺ is a strong oxidising agent, even though both have d⁴ configuration. The correct explanation is:

In potassium permanganate (KMnO4), the structure of the permanganate ion is:

Which of the following is an interstitial compound?

The general electronic configuration of transition elements is:

The reducing power order in aqueous solution among Ti²⁺, V²⁺ and Cr²⁺ in the first transition series is such that all three can:

In the reaction of KMnO4 with Fe²⁺ in acidic solution, the Mn is reduced to:

Which property is NOT generally exhibited by transition metals?

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