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Because of lanthnoid contraction, which ...

Because of lanthnoid contraction, which of the following pairs of elements have nearly same atomic radii ? (Number in the parenthesis are atomic numbers)

A

Ti(22) and Zr(40)

B

Zr(40) and Nb(41)

C

Zr(40) and Hf(72)

D

Zr(40) and Ta(73)

Text Solution

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The correct Answer is:
C
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TARGET PUBLICATION-D AND F-BLOCK ELEMENT -COMPETITIVE THINKING
  1. In lanthanoids , atomic radius decreases as atomic no. increases becau...

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  2. The most basic hydroxide from the following is

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

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

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

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

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  7. Which of the following is NOT an actinide?

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

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

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  10. The only radioactive element among the lanthanoids is

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  11. Identify the INCORRECT statement among the following.

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

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

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

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

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

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

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  18. Which statement is NOT correct?

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  19. Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 ...

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  20. The CORRECT statement is .

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