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Because of lanthanoid contraction :...

Because of lanthanoid contraction :

A

separation of the elements is possible

B

there is a very small difference in the atomic size of the transition metals of 5th and 6th period and present in the same group.

C

there is a gradual decrease in the basic strengths of the hydroxides of lanthanoids

D

All are correct.

Text Solution

Verified by Experts

The correct Answer is:
D
all the statements are correct.
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(a) What is lanthanoid contraction? What is the cause of lanthanoid contraction? (b) Explain whether Cu^(2+) is paramagnetic or diamagnetic.

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Knowledge Check

  • Because of lanthanoide contraction, which of the following pairs of elements have nearly same atomic radii ? (Numbers 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)

  • Which of the following factors may be regarded as the cause of lanthanoid contraction ?

    A
    Effective shielding of one Jr4/electrons by another in subshell.
    B
    Poor shielding of one of 4f electrons by another in the subshell.
    C
    Increase in nuclear charge outweighs the imperfect shielding by /-electrons.
    D
    Poorer shielding of 5d electrons by 4/electrons.

  • Which of the following factors may be reagreded as the main cause of lanthanoid contraction ?

    A
    Greater shielding of 5d electrons by 4f electrons
    B
    Poorer shielding of 5d electrons by 4f electrons
    C
    Effective shielding of one of 4f eletrons by another in the subshell
    D
    Poor shielding of one of 4f electrons by another in the subshell

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    (a) What is the cause of lanthanoid contraction? Discuss. (b) What is Misch metal?

    (a) Why do transition elements show catalytic properties? (b) Calculate equivalent weight of KMnO_4 in neutral medium. ( c) What is the cause of lanthanoid contraction?

    Zr and Hf have almost equal atomic and ionic radii because of (a) lanthanoid contraction (b) diagonal relationship (c) actinoid contraction (d) belonging to the same group

    Reason of lanthanoid contraction is

    Which of the following factors may be regarded as the main cause of lanthanoide contraction?

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