(i) CO32-, NO3-
(ii) ClO3- , CO32-
(iii) SO32-, NO3-
(iv) ClO3- , SO32–
Correct Answer: (i) CO32-, NO3-
Explanation: CO32- and NO3- are the pairs of ions that are isoelectronic and isostructural.
(i) CO32-, NO3-
(ii) ClO3- , CO32-
(iii) SO32-, NO3-
(iv) ClO3- , SO32–
Correct Answer: (i) CO32-, NO3-
Explanation: CO32- and NO3- are the pairs of ions that are isoelectronic and isostructural.