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Question

The compound in which nickel has the lowest oxidation state is:

A
Ni(CO)4
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B
(CH3COO)2Ni
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C
NiO
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D
NiCl2(PP3)2
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Solution

The correct option is A Ni(CO)4
The oxidation state of nickel in Ni(CO)4,(CH3COO)2Ni,NiO and NiCl2(PP3)2 are 0, +2,+2 and +2 respectively.
Thus, Ni(CO)4 has lowest oxidation state.

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