Question

A binary solid has rock salt structure if the edge length is 400 pm and eadius od cation is 75 pm then

Answer 1

A)

Solution :

a=2(r++r−)a=2(r++r−)

500=2(80+r−)500=2(80+r−)

500=160+r−500=160+r−

500−160=2r−500−160=2r−

340=2r−340=2r−

34023402=r−=r−

r−=170r−=170

∴∴ the radius of anion =170pm