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The reason for greater range of oxidatio...

The reason for greater range of oxidation state in actinoids is attributed to:

A

actinoid contraction

B

5f, 6d and 7s levels having comparable energies

C

4f and 5d levels being close in energies

D

the radioactive nature of actinoids

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The correct Answer is:
B
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The reason for the greater range of oxidation states of actinoids is attributed to

How would you account for the following : (i) Many of the transition elements are virtually the same as those of the corresponding members of the second series. (iii) There is a greater range of oxidation states among the actinoids than among the lanthanoids.

(a) When a chromite ore (A) is fused with an aqueous solution of sodium carbonate in free excess of air, a yellow solution of compound (B) is obtained. This solution is filtered and acidified with sulphuric acid to form compound (C). Compound (C) on treatment with solution of KCl gives orange crystals of compound (D). Write the chemical formulae of compounds A to D. (b) Describe the cause of the following variations with reSQPect to lanthanoids and actinoids: (i) Greater range of oxidation states of actinoids as compared to lanthanoids. (ii) Greater actinoid contraction as compared to lanthanoid contraction. (iii) Lower ionisation enthalpy of early actinoids as compared to the early lanthanoids.

There is a greater range of variable oxidation states among the actinoids than among the lanthanoids, Why ?

Which element show highest oxidation state in actinoid

TARGET PUBLICATION-D AND F-BLOCK ELEMENT -COMPETITIVE THINKING
  1. Identify a 'Chemical twin' among the foolowings.

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  2. Which of the following statement(s) is/are incorrect for pair of elem...

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  3. Which of the following is NOT an actinide?

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  4. The actinoids exhibit more number of oxidation states in general than ...

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  5. The reason for greater range of oxidation state in actinoids is attrib...

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  6. The only radioactive element among the lanthanoids is

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  7. Identify the INCORRECT statement among the following.

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  8. Which is not the correct statement about the chemistry of 3d and 4f se...

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  9. An element in +2 oxidation state has the electronic configuration [Ar]...

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  10. In context with the transition element, which of the following stateme...

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  11. Iron exhibits +2 and +3 oxidation states. Which of the following state...

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  12. The basic character of the transition metal monoxide follows the order

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  13. All the following statements about the transitional elements are true ...

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  14. Which statement is NOT correct?

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  15. Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 ...

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  16. The CORRECT statement is .

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  17. Which of the following is a transition element as per the ground state...

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  18. Which of the following oxide has the maximum basicity?

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  19. Which one of the following statements related to lanthanons is incorre...

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  20. Sodium salt of an organic acid 'X' produces effervescence with conc. H...

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