question_answer 61)

    Which of the following is isoelectronic pair? (a)                     (b) (c)                    (d)

Answer:

                    (b) Isoelectronic pair have same number of electrons

Total number of electrons

  Hence (b) is the correct choice, while in another cases this value is not equal.

ICI2	ClO2
53+2x17=87	17+16=33
CIO2	BrF
17 + 16 = 33	35 + 9 = 44
CN-	O3
= 6 + 7 + 1 = 14	= 8 x 3 = 24

            Hence, only (b) is the correct choice.