Question

An indicator ' X ' is used for studying the effect of variation in concentration of iodide : on the rate of reaction of iodide ion with $H_2O_2$ at room temp. The indicator ' X ' forms blue colored complex with compound ' A ' present in the solution. The indicator ' X ' and compound 'A' respectively are

• A. Methyl orange and $H_2O_2$
• B. Starch and iodine
• C. Starch and $H_2O_2$
• D. Methyl orange and iodine

Answer 1

Answer: (B)

Starch and iodine

Answer 2

The correct option is (B): Starch and iodine.