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In context of the lanthanoids, which of ...

In context of the lanthanoids, which of the following statements is not correct?

A

There is gradual decrease in the radii of the members with increasing atomic number in the series

B

All the members exhibit +3 oxidation state

C

Because of similar properties the separation of lanthanoids in not easy

D

Availability of 4f electrons results in the formation of compounds in +4 state for all members of the series

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The correct Answer is:
D
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BANSAL-D AND F BLOCK ELEMENTS-Exercise-1 (Single Correct Choice Type)
  1. Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 ...

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  2. The highest oxidation state achieved by trantion metal is given by -

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  3. In context of the lanthanoids, which of the following statements is no...

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  4. The equilibrium Cr(2)O(7)^(2-)hArr 2CrO(4)^(2-)

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  5. When the same amount of Zn is treated with excess of H(2)SO(4) and exc...

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  6. (NH(4))(2)Cr(2)O(7)( Ammonium dichromate ) is used in fire works. The ...

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  7. The d-block elements which is a liquid at room temperature, having hig...

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  8. Coinage metals show the properties of

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  9. Cr(2)O(7)^(2-)underset(Y)overset(X)hArr 2CrO(4)^(2-)X and Y are respec...

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  10. CrO(3) dissolves in aqueous NaOH to give:

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  11. An ornament of gold having 75% of gold, is of carat.

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  12. Solution of MnO(4)^(-) is purple-coloured due to :

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  13. Transition elements having more tendency to form complex than represen...

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  14. uarr Y(g)overset(KI)(larr)CuSO(4)overset(dilH(2)SO(4))(rarr)X(Bluecolo...

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

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  16. x,y and z are respectively

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  17. underset(("bot"))(Cu+conc.HNO(3))toCu(NO(3))(2)+X (oxide of nitrogen...

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  18. Pick out the incorrect statement:

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  19. The metals present in insulin and haemoglobin are respectively:

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  20. Metre scales are madeup of alloy:

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