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UI: a rock sample was added to cold dilute HNO3. the gas evolved was passed...

UI: a rock sample was added to cold dilute HNO3. the gas evolved was passed into a solution of acidified k2cr2o7 and the solution turned green. the rock sample contains?
In Chemistry
2 Answers Available
Asked by Kristian-kruize on 5th May, 2017
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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