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(A) : The P^H of a solution changes from 5 to 8 when the solution is diluted by 1000 times.
(R) : When the conc.of H⁺ ion decreases by 100 times, then P^H of the solution increases by one unit

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(A) is true but (R) is false

both (A) and (R) are true and (R) is correct explanation of (A)

Both (A) and (R) are false

Both (A) and (R) are true and (R) is not correct explanation of (A)

answer is D.

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Detailed Solution

On dilution, the P^H of the acid solution is always less than 7.

When [H⁺] decreases by 100 times P^H increases by 2 units.

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