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Greater range of oxidation states of act...

Greater range of oxidation states of actinoids is because

A

5f, 6d and 7s levels are of comparable energies.

B

They possess large atomic numbers.

C

They possess large atomic masses.

D

They are radioactive.

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The correct Answer is:
A
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Explore conceptually related problems

(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.

The reason for the greater range of oxidation states of actinoids is attributed to

The reason for greater range of oxidation state in 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.

Assertion: Actinoids show greater number of oxidation states than lanthanoids. Reason: Actinoids are radioactive.

U-LIKE SERIES-THE D-AND F-BLOCK ELEMENTS -MULTIPLE CHOICE QUESTIONS
  1. Electronic configuration of vanadium is

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  2. Which of the following is not a transition element ?

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  3. The colour of potassium dichromate is

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  4. The electronic configuration 3d^(5)4s^(2) corresponds to the metal

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  5. The element in the first transition series that exhibits maximum numbe...

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  6. Colour of Ti^(4+) (3d^(0)) metal ion is

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  7. Chromite ore is fused with Na(2)CO(3) in free excess of air. The yello...

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  8. With increase in atomic number the melting point of transition metals

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  9. Which of the properties listed below is not shown by interstitital com...

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  10. Relation between magnetic moment (spin-only formula) and number of unp...

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  11. Finely divided iron is used as a catalyst in an industrial process. Th...

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  12. Magnetic moment of transition metal ion is 5.92 BM (spin-only formula)...

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  13. Atomic number and electronic configuration of Cerium are respectively

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  14. A mixture of TiCl(4) with Al(CH(3))(3) is used as Zieglar catalyst for...

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  15. MnO(2) is fused with an alkali. We obtain a green mass which on acidic...

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  16. Greater range of oxidation states of actinoids is because

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  17. Which of the following is not produced using misch metal ?

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  18. Potassium permanganate titrations are not performed in the presence of...

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  19. Which of the following sets of configurations of actinoids is most sta...

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  20. The atomic number and electronic configuration of Plutonium respective...

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