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What is the oxidation number of gold in the complex `[AuCl_(4)]^(1-)` ?A. `+4`B. `+3`C. `+2`D. `+1`

Answer» Correct Answer - B
Let x be the oxidation number of gold (Au) in the complex `[AuCl_(4)]^(-1)`
`:." "x+4(-1)=-1`
`rArr" "x=-1+4`
`rArr" "x=+3`
Hence, the oxidation number of gold is `+3`


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