question_answer 78)

      Match the complex ions given in Column I with the colours given in Column II and assign the correct code.

	Column I (Complex ion)	Column II (Colour)
A.		1. Violet
B.		2. Green
C.		3. Pale blue
D.		4. Yellowish orange

            Codes      A   B   C   D                         A B   C   D (a) 1   2   4   5                   (b) 4   3   2   1 (c) 3   2   4   1                   (d) 4   1   2   3

Answer:

                        A. ® (4)    B. ® (3)    C. ® (2)    D. ® (1) Colour of coordination compound is closely related to CFSE of coordination compound. Depending upon the CFSE of given coordination compounds. Correct matching will be as follows

	Column I (Complex ion)	Column II (Colour)
A.		4. Yellowish orange
B.		3. Pale blue
C.		2. Green
D.		1. Violet

Hence, correct choice is (b).