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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 a gradual decrease in the raii of the members with increasing atomic number in the series.

B

All the member exhibit +3 oxidation state.

C

Because of similar properties the separation of lanthanoids is not easy.

D

Availability of 4f electrons results in the formation of compounds in +4 state for all the m embers of the series.

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The correct Answer is:
D
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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 3
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  2. The correct order of E(M^(2+)//M)^(@) Values with negative sign for th...

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

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  4. The outer electrons configuration of Lu (Atomic No.,71) is :

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

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  6. Which one of the following arrangements does not represent the correct...

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  7. Four successive members of the first row transition elements are liste...

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  8. Which series of reactions correctly represents chemical rections relat...

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  9. The equation which is balanced and represents the correct product(s) i...

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  10. Match the catalysts to the correct processes :

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  11. The colour of KMnO(4) is due to

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  12. Chloro compound of vanadium has only spin magnetic moment of 1.73 BM. ...

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  13. Which one of the following exhibits the largest number of oxidation st...

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  14. Copper becomes green when exposed to moist air for a long period. This...

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  15. Which of the following statements is false?

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  16. Which one of the following species is stable in aqueous solution?

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  17. The transition metal ions responsible for color in ruby and emerald ar...

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  18. The pair of compounds having metals in their highest oxidation state i...

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  19. When XO(2) is fused with an alkali metal hydroxide in presence of an o...

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  20. The highest value of the calculated spin-only magnetic moment (in BM)...

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