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Q.

The colour exhibited by one of the iron ions in aqueous solutions is pale green. The primary valency and secondary valency respectively in the green complex are

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a

2, 6

b

2, 4

c

3, 6

d

3, 4

answer is B.

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Detailed Solution

Iron complex that shows pale green color is [Fe(H2O)6]2+. Here, the primary valency (oxidation state of Fe) is +2 and secondary valency is 6.

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