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Q.

In which of the following pairs the difference between the covalent radii of the two metals is maximum

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a

K,Ca

b

Mn,Fe

c

Co, Ni

d

Cr, Mn

answer is A.

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Detailed Solution

Covalent radii decreases on going from left to right in periods. However among the transition elements the size do not changes much because the electrons add to the penultimate d-subshells ie. (n- 1)d-subshell.
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