Sulphur dioxide gas turns acidified potassium dichromate paper_____.

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Solution

The correct option is B green
Potassium dichromate $(H_{2} C r_{2} O_{7})$ is orange in colour. Oxidization state of Cr is +6 in potassium dichromate.
when it reacts with $SO_{2}$ and $H_{2}O$ the following reaction takes place
$SO_{2} + H_{2}O \Rightarrow H_{2}SO_{4}$
$H_{2}Cr_{2}O_{7} + 3SO_{2} + H_{2}SO_{4} \Rightarrow Cr_{2}(SO_{4})_{3} + H_{2}SO_{4} + H_{2}O$
Formation of $Cr_{2}(SO_{4})_{3}$ takes place in which oxidation state of chromium is +3 and orange colour changes to green.

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Similar questions

Why does sulphur dioxide turns acidified potassium dichromate paper green

Q. Choose the correct answer:
Carbon dioxide and sulphur dioxide gas can be distinguished by using:
(a) moist blue litmus paper.
(b) lime water
(c) acidified potassium dichromate paper
(d) none of the above.

Q. Name the gas in each of the following:
A gas which turns acidified potassium dichromate clear green:

Which of the following anion is present in compound A when warmed with dilute sulphuric acid gives a colourless gas which turns acidified potassium dichromate solution green.

Q. When sulphur dioxide gas is passed through acidified potassium dichromate solution, the colour of the solution changes from :
(1) orange to yellow
(2) orange to green
(3) green to orange
(4) yellow to green

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Sulphur dioxide gas turns acidified potassium dichromate paper_____.

The correct option is B greenPotassium dichromate (H2Cr2O7) is orange in colour. Oxidization state of Cr is +6 in potassium dichromate.when it reacts with and the following reaction takes placeFormation of takes place in which oxidation state of chromium is +3 and orange colour changes to green.