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Q.

Which of the following is correct?

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a

Radius of Ca2+

b

Radius of Cl−

c

Radius of S2−

d

Radius of S2−

answer is A.

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Detailed Solution

SpeciesAtomic numberNumber of electronsCa2+2020-2=18Cl-1717+1=18In case of isoelectronic species, for increase in atomic number, decrease in size is shown, Thus, order of radius will be Ca2+
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