Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas?
A.
chlorine attacks the starch to give the blue-black color
B.
chlorine attacks the iodide ion to give the blue-black color
C.
chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color
D.
iodine attacks the starch to give the blue-black color
Correct Answer: Option C
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