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SN1 Reaction Mechanism

A metal salt ...

Question

A metal salt solution when treated with dimethyl glyoxime and
$N H_{4} O H$ gives a rose red complex. The metal is:

A

N i

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B

M n

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C

C o

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D

Z n

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Solution

The correct option is A $N i$
The solution must contain $N i^{2 +}$ as it forms a complex with dimethyl glyoxime (DMG) giving $[N i (D M G)_{2}]$ which is rose-red in colour.

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