Which of the following reagents would satisfy the given reaction?

What would be the product of the given reaction?

A chemist adds the orange oxidizing agent, Na2Cr2O7, to the following substrates and dissolves the mixture in an aqueous solution of sulfuric acid. Oxidation is indicated by the disappearance of the orange color. Which of the substrate-oxidant solutions will remain orange?

Which of the following substrates will be oxidized into a ketone when reacting with ?