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Iodine is obtained commercially from Chile saltpetre through the reaction

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Iodine is obtained commercially from Chile saltpetre through the reaction
A. `NaNO_(3)`
B. `KNO_(3)`
C. `Na_(2)SO_(4)`
D. `Na_(2)S_(2)O_(3)`
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Correct Answer - A
Chile saltpetre is `NaNO_(3)` while `KNO_(3)` is Indian saltpetre. `Na_(2)SO_(4)` is Glauber salt and `Na_(2)S_(2)O_(3)` is known as Hypo.
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