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Lanthanoids are-...

Lanthanoids are-

A

14 elements in the sixth period (atomic no. 90 to 103) that are filling 4f sublevel

B

14 elements in the seventh period (atomic no. 90 to 103 ) that are filling 5f sublevel

C

14 elements it the sixth period (atomic no. 58 to 71) that are filling the 4f sublevel

D

14 elements in the seventh period (atomic no. 50 to 71) that are filling 4f sublevel.

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The correct Answer is:
C
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NCERT FINGERTIPS-PRACTICE PAPER -2-Practice Paper 2
  1. Which one has the highest melting point ?

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  2. Match the column I with column II and mark the appropriate choice.

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  3. Lanthanoids are-

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  4. Which of the following pairs of structures represents facial and merid...

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  5. What is the main composition of matte?

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  6. Which of the following does not show positive deviation form Raoult's ...

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  7. Which of the following is not an artificial sweetener ?

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  8. Equanil is an example of

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  9. The freezing point depression of 0.1 molal solution of acetic acid in ...

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  10. An example of dibasic acid is

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  11. Synthetic rubbers are usually obtained by copolymeisation of

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  12. The arrangement ABC ABC….is referred to as

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  13. The number of Faradays needed to reduce 4 g equivalents of Cu^(2+) t...

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  14. The reaction , 2AB(g) + 2C(g) to A(2(g)) + 2BC((g)) proceeds according...

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  15. I both DNA and RNA, heterocyclic base and phosphate ester linkages are...

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  16. MgO crystallized as rock salt. The number of nearest oxide ions to Mg^...

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  17. Name of the drug whose structure given below is

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  18. In the Cannizzaro reaction given below: 2Ph-CHO overset(overset(Θ)OH...

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  19. In the following question, a statement of assertion is followed by a s...

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  20. A synthetic polyamide prepared by prolonged heating of caporlactam is

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