In the study of oxidation of iodide ions...

In the study of oxidation of iodide ions by hydrogen peroxide in presence of an acid and starch as a clock reaction,

thiosulphate added should be in large amount

thiosulphate added should be in small amount

amount of thiosulphate added has no importance

thiosulphate is added to speed up the reaction

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The correct Answer is:

Thiosulphate added should be in small amount so that it reacts away with iodine and the iodine further liberated can give blue colour with starch.

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In the study of oxidation of iodide ions by hydrogen peroxide in presence of dilute H_(2)SO_(4) and starch as a clock reaction, if excess of thiosulphate is added

blue colour will appea immediately

blue colour will not appear at all

blue colour will appear only on heating the reaction mixture

blue colour will appear after a very long time

less time will be taken for blue color to appear

more time will be taken for blue colour to appear

same time will be taken for blue colour to appear

any one of the above can happen depending upon the amount of `H_(2)SO_(4)` present.

`-1`

`+1`

zero

`-2`