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Size of lanthanoid decrease becaue of p...

Size of lanthanoid decrease becaue of poor screening of

A

4f

B

3d

C

5f

D

4d

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A
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Lanthanoids.

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Give reasons for each of the following: (i) Size of trivalent lanthanoid cation decrease with increase in the atomic number. (ii) Transition metal fluorides are ionic in nature whereas bromides and chlorides are usualy covalent in nature. (iii) Chemistry of all the lanthanoids is quite similar.

The size of pupil decreases due to the contraction of

AAKASH INSTITUTE-THE D AND F-BLOCK ELEMENTS -Assingnment(Section -A ( Objective Type Questions)(One option is correct))
  1. The inner transition element that is radioactive is

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  2. The lanthanide contraction is responsible for the fact that

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  3. Size of lanthanoid decrease becaue of poor screening of

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  4. The strongest base is

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  5. The element that is not present in misch metal is

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  6. Most stable oxidation state of Lanthanoids

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  7. When intimate mixture of potassium dichromate and potassium chloride i...

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  8. Which one of the following pairs of ions have the same electronic conf...

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  9. Cr(2)O(7)^(2-)+Xoverset(H^(o+))rarrCr^(3+)+H(2)O+ "oxidised product" o...

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  10. The reducing nature of any metal in aqueous solution depends upon a...

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  11. Which of the following oxide is basic ?

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  12. The spin only magnetic moment of transition metal ion found to be 5.92...

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  13. The correct electronic configuration of lanthanum is

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  14. Give the general electronic configuration of actinides.

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  15. Lanthanoid which is radioactive is

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  16. Which is correct

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  17. Lanthanides and Actinides generally differ in

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  18. Acidified K(2)Cr(2)O(7) on reaction with hydrogen peroxide give deep b...

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  19. Hybridisation of chromium ions in chromate and dichromate ions is resp...

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  20. Equivalent weight of Baeyer's reagent is

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