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Q.

An example of complex in which effective atomic number is not equal to atomic number of the noble gas

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a

${[Fe (CN)_{6}]}^{4 -}$

b

${[Ni (CN)_{4}]}^{2 -}$

c

${[Co {({NH}_{3})}_{6}]}^{3 +}$

d

$[Ni (CO)_{4}]$

answer is A.

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Detailed Solution

${[Ni (CN)_{4}]}^{2 -}$

EAN = 28 - 2 + 2 (4)
= 26 + 8
=34

And for other its 36

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