Q.

Chloride ion and potassium ion are isoelectronic. Then

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a

Potassium ion is relatively bigger

b

Depends on the other cation and anion

c

Their size are same

d

Chloride ion is bigger than potassium ion

answer is D.

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Detailed Solution

Chloride ion and potassium ion are ioselectronic, isoelectronic ions are those ions having same number of electrons.K   = 2, 8, 8, 1        ---       K+=2,8,8Cl = 2, 8, 7             ---       Cl−=2,  8,  8Hence anion is bigger than cation
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Chloride ion and potassium ion are isoelectronic. Then