1.

The pair that has similar atomic radii is : (1) Mo and W (2) Mn and Re (3) Ti and Hf (4) Sc and Ni

Answer»

Correct option (1) Mo and W   

Explanation:

Sol. Size of 3d < 4d = 5d (due to lanthanoid contraction) 

So, size M0 ≅ W



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