Q.

The complex, Cr(CO)x obeys EAN rule value of ‘x’ is

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a

2

b

4

c

6

d

5

answer is C.

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Detailed Solution

If EAN is obeyed the value of EAN of the complex must be equal to atomic number of next higher inertgas.∴ EAN of Cr(CO)x must be 36.EAN = ‘Z’ of central metal -oxidation state of metal +2(Coordination number)36 = 24 - 0 + 2xx = 6
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