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Which of the following statements is not...

Which of the following statements is not true?

A

`La(OH)_3` is more basic than `Lu(OH)_3`

B

All f-block elements are radioactive in nature.

C

The principal oxidation state of lanthanides is +3.

D

The size of trivalent lanthanide ions decrease in 4f block series.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. The atomic numbers of three lanthanide elements X,Y and Z are 65,68 a...

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  2. Ce (Z = 58) and Yb (Z = 70) exhibit stable +4 and +2 oxidation states ...

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  3. Which of the following statements is not true?

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  4. Assertion : Tungsten has very high melting point. Reason : Tungsten ...

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  5. Assertion : Cuprous salts are diamagnetic. Reason : Cu has 3d-filled...

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  6. Electronic configuration of Fe^2+.........

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  7. Why is La(OH)3 more basic than Lu(OH)3 ?

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  8. Assertion : FeCl3 reacts with KCNS to give blood red colouration. Re...

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  9. Draw lewis dot structure of SO2

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  10. Why Zn^(2+) salts are colourless and Ni2+ salts are coloured?

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  11. Reason of lanthanoid contraction is :

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  12. Why the actinoids exhibit a large number of oxidation states than the ...

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  13. Draw lewis dot structure of F2O.

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  14. Complete the following:

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  15. Choose the correct option- Bronze alloy has the following composition-

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  16. The answer to each of the following questions is a single- digit -in...

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  17. The number of electrons present in the 4f-subshell of Gd (Z = 64) is

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  18. Draw lewis structure of NCl3

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  19. The number of paramagnetic ions among Ti^(3+), Cr^(3+), Ti^(4+), Fe^(2...

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  20. The magnetic moment of a transition metal ion is found to be 4.90 BM. ...

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