Which one of the following statements related to lanthanons is incorrect?
All the lanthanons are much more reactive than aluminium.
Ce (+4) solutions are widely used as oxidizing agent in volumetric analysis.
Europium shows +2 oxidation state.
The basicity decreases as the ionic radius decreases from Pr to Lu.
A
Ce (+4) solutions are widely used as oxidizing agent in volumetric analysis.
B
All the lanthanons are much more reactive than aluminium.
C
Europium shows +2 oxidation state.
D
The basicity decreases as the ionic radius decreases from Pr to Lu.
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Solution
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The first few members of the lanthanoid series are quite reactive, almost like calcium. However, with increasing atomic number their behaviour becomes similar to that of aluminium metal.
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