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In lanthanoids , atomic radius decreases...

In lanthanoids , atomic radius decreases as atomic no. increases because of____________.

A

f-f transition

B

lanthanide contraction

C

unpaired electrons in f orbital

D

unpaired electrons in s orbital

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The correct Answer is:
B
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  2. Reason of lanthanoid contraction is

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  3. In lanthanoids , atomic radius decreases as atomic no. increases becau...

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  4. The most basic hydroxide from the following is

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  5. Because of lanthnoid contraction, which of the following pairs of elem...

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  6. Which of the following pairs has the same size ?

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  7. Identify a 'Chemical twin' among the foolowings.

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

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  9. Which of the following is NOT an actinide?

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

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

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  12. The only radioactive element among the lanthanoids is

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  13. Identify the INCORRECT statement among the following.

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

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

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

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

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

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

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  20. Which statement is NOT correct?

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