Q.

If the radius of Fe++ is 0.76Ao; the radius of Fe+++ is

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a

0.64Ao

b

0.76Ao

c

0.88Ao

d

1.08Ao

answer is A.

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Detailed Solution

Size of Fe+2 >Fe+3...... positive charge increases, effective nuclear charge increases, size decreases
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If the radius of Fe++ is 0.76Ao; the radius of Fe+++ is