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Which one of the following statements re...

Which one of the following statements related to lanthanons is incorrect ?

A

Europium shows `+2` oxidation state

B

The basicity decreases as the ionic radius decreases form Pr to Lu.

C

All the lanthanons are much more reactive than aluminium

D

`Ce(+4)` solution are widely used as oxidizing agent in volumetric analysis.

Text Solution

Verified by Experts

The correct Answer is:
B
The basicity decreases as the ionic radius decreases form `Ce^(3+)` to `Lu^(3+)` . Thus `Ce(OH)_(3)` is the strongest base while `Lu(OH)_(3)` is the weakest base.
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  • Which one of the following statements related to lanthanoids is INCORRECT?

    A
    Ce (`+4`) solutions are widely used as oxidizing agent in volumetric analysis.
    B
    Europium shows`+2 `oxidation state.
    C
    The basicity decreases as the ionic radius decreases from Pr to Lu.
    D
    All the lanthanoids are much more reactive than aluminium.

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    A
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    H - has one electron short in comparison with octet configuration
    C
    The ionization enthalphy of H is 1312 kJ/mol
    D
    Hydrogen is less reactive when compared with halogens

  • Which one of the following statement is incorrect?

    A
    India is the second largest manufacturer of cement in the world.
    B
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    C
    India holds 3rd position in the production of salt in the world.
    D
    India is the second largest producer of cotton in the world after China.
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