Class 12

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

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Q1.

For a catalyst which condition is not essential:  

(A)
Variable oxidation states
(B)
High ionisation energy
(C)
Vacant orbitals
(D)
Free valency on the surface
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Q2.

To which of the following series the transition element from Z = 39 to Z = 48 belong:  

(A)
3d series
(B)
4d series
(C)
5d series
(D)
6d series
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