Class 12

21. d & f block elements question bank (Chemistry)

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Q1.

The correct order of ionic radii of Y³âº, La³âº, Eu³âº and Lu³âº is

(A)

Lu³âº < Eu³âº < La³âº < Y³âº

(B)

La³âº < Eu³âº < Lu³âº < Y³âº

(C)

Y³âº < La³âº < Eu³âº < Lu³âº

(D)

Y³âº < Lu³âº < Eu³âº < La³âº

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Q2.

The aqueous solution containing which one of the following ions will be colourless :-
[Atomic no. : Sc = 21, Fe = 26, Ti = 22, Mn = 25]

(A)

Fe²âº

(B)

Mn²âº

(C)

Ti³âº

(D)

Sc³âº

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