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(a) Sulphur dioxide gas turns a dichromate solution green. Write the reaction. (b) Also write the reaction when nickel salts in basic medium react with dimethyl glyoxime. |
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Answer» SOLUTION :`({:(Cr_(2)O_(7)^(" "2-)+14H^(+)+6bar(e)to2Cr^(3+)+7H_(2)O),([SO_(2)+2H_(2)OtoSO_(4)^(" "2-)+4H^(+)+2e^(-)]xx3),(3SO_(2)+6H_(2)Oto3SO_(4)^(""2-)+12H^(+)+6bar(c)):})/(Cr_(2)O_(7)^(" "2-)+3SO_(2)+2H^(+)tounderset(("green"))(2Cr^(3+)+3SO_(4)^(" "2-)+H_(2)o)` (B) `Ni^(2+)` salts, in a basic medium, on reaction with dimethylglyoxime, give a cherry red precipitate of nickel dimethyl glyoximate. 
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