In basic medium the amount of `Ni^(2+)` in a solution can be estimated with dimenthylglyoxime regent. The correct statement(s) about the reaction and the product is (are) -

Options

A. in ammoniacal solution `Ni^(2+)` salts give cherry - red precipitate of nickel (II) dimethylglyoximate
B. two dimethylglyoximate units are bound to one `Ni^(2+)`
C. in the complex two dimethylglyoximate units are hydrogen bonded to each other
D. each dimethylglyoximate units form a six - membered chelate ring with `Ni^(2+)`

Answer

A, B, C

Explanation