Chemistry
Assertion (A): Chlorine turns moist blue litmus red and finally decolourises it.
Reason (R): Chlorine is acidic in nature and an oxidising agent.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Practical Chemistry
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation ā Chlorine reacts with water to form hydrochloric acid (HCl) and hypochlorous acid (HClO).
Cl2 + H2O HCl + HClO
These acids make the solution acidic, turning moist blue litmus red and due to the oxidising nature of HClO, the dye in the litmus paper is bleached, leading to discolourisation. Hence, both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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