A mixture of starch solution and potassium iodide was placed in a test tube. On adding dilute tetraoxosulphate (lV) acid and then K2Cr2O7 solutions, a blue-black colour was produced. In this reaction, the?
A.
iodide is oxidized
B.
tetraoxosulphate (Vl) acid acts as an oxidizing agent
C.
starch has been oxidized
D.
K2Cr2O7 is oxidized
Correct Answer: Option C
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