Q4 / 160 · TS EAMCET 2024 (10 May Shift 2) · Chemistry

Assertion (A) : The ionic radii of $\mathrm{Na}^{+}$and $\mathrm{F}^{-}$are same Reason (R): Both $\mathrm{Na}^{+}$and $\mathrm{F}^{-}$are isoelectronic species The correct answer is

  • A
    (A) and (R) are correct. (R) is the correct explanation of (A)
  • B
    (A) and (R) are correct, but (R) is not the correct explanation of $(\mathrm{A})$
  • C
    (A) is correct but (R) is not correct
  • Correct answer
    D
    (A) is not correct but ( R ) is correct

Solution

Ionic radii of $\mathrm{F}^{-}$is greater than $\mathrm{Na}^{+} \mathrm{Na}^{+}$and $\mathrm{F}^{-}$both have ten electrons so they are isoelectronic species.

Hence, the correct answer is option: 'D'.

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