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