12th Class
Chemistry
Sample Paper
Chemistry Olympiad Sample Paper-1
question_answer
A compound is soluble in cone. \[{{H}_{2}}S{{O}_{4}}\]. It does not decolourise bromine in \[CC{{l}_{4}}\] but is oxidised by chromic any hydride in aqueous sulphuric acid within two seconds, turning orange solution to blue green, then opaque. The original solution contains