D-And F-Block Elements Ques 23

Question: In which of the following ionic radii of chromium would be smallest

[MP PET 1994]

Options:

A) $ K_2CrO_4 $

B) $ CrO_2 $

C) $ CrCl_3 $

D) $ CrF_2 $

Show Answer

Answer:

Correct Answer: A

Solution:

Oxidation number of $ Cr $ in options a, b, c and d are +6, + 4, + 3, + 3 respectively. In given options a has high oxidation number therefore its radii will be low. Atomic radii decreases with increase in oxidation no.



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