What happens when blue litmus paper is dipped into chlorine water?

Paper becomes red

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Paper becomes white

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Paper remains blue

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Paper dissolves

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Solution

The correct option is A Paper becomes red
Chlorine water on standing initially gives an amount of hypochlorous acid $H O C l$ . So, the color of the litmus paper will change from blue to red. After some time $H C l$ and $H C l O_{3}$ will be produced and both of them are acidic.

$C l_{2} + H_{2} O ⟶ H C l O_{3} + H C l$
Hence, option $A$ is correct.

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Similar questions

Q. What happens to blue litmus paper when it is dipped in vinegar?

What happens when [5 MARKS]

a) A red litmus paper is dipped in a solution of calcium hydroxide.

b) A red litmus paper is dipped in a solution of sodium chloride.

c) A blue litmus paper is dipped in lemon juice.

d) A red litmus paper is dipped in distilled water.

e) A solution of sodium hydroxide is added to turmeric.

When blue litmus paper is dipped into the water, the colour of litmus paper remains same. Similarly, when red litmus paper is dipped into the water, the colour remains same. By the above observation, we can conclude that:

Q. Why does moist blue litmus turn red and finally becomes colourless in the presence of chlorine?

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