1. Tardigrade
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  3. Chemistry
  4. 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 2 O 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

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Q. An indicator ' $X$ ' is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion with $H _2 O _2$ 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

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Solution:

$I ^{-}+ H _2 O _2 \longrightarrow \underset{(A)}{I _2}+ H _2 O$
$I _2+\underset{\text { (Indicator) }}{\text { Starch }} \longrightarrow \text { Blue }$