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I have a doubt, kindly clarify. Which one of the followng statements related to lanthanons is incorrect?

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

  • Option 1)

    Europium shows +2 oxidation state.

  • Option 2)

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

  • Option 3)

    All the lanthanons are much more reactive than aluminium.

  • Option 4)

    Ce(+4) solutions are widely used as oxidizing agent in volumetric analysis

 
Answers (1)
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As we discussed in the concept 

Reactivity of lanthanons matches with alkaline metals specially barium due to being the number of same period


Option 1)

Europium shows +2 oxidation state.

Option is incorrect

Option 2)

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

Option is incorrect

Option 3)

All the lanthanons are much more reactive than aluminium.

Option is correct

Option 4)

Ce(+4) solutions are widely used as oxidizing agent in volumetric analysis

Option is incorrect

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