NEET Chemistry The Solid State Questions Solved

The arrangement of Xions around A+ ion in solid AX is given in the figure (not drawn to scale).
If the radius of X is 250 pm,the radius of A+ is:

(a)104 pm
(b)125 pm
(c)183 pm
(d) 57 pm

(a) The figure represents an octahedral void
rA+/ rX-=0.414

rA+=0.414x250=104 pm

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