Multiple choice

Which of the following ions have identical geometry? (i) NH4+, (ii) IF4+, (iii) ClO2-, (iv) ClO4

  1. Only i and ii.

  2. ii and iii.

  3. Only i and iv

  4. Only i, ii and iii.

  5. Only ii, iii and iv.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

NH4+ and ClO4- both ions have four bond pairs of electrons and zero lone pairs of electrons with tetrahedral geometry. IF4+ has four bond pairs of electrons and one lone pair of electrons with seasaw geometry. ClO2- has three bond pairs of electrons and two lone pairs of electrons with V-shaped geometry. Hence, i and iv are identical in geometry.

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