Q.

(A) : The PH 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 PH of the solution increases by one unit

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a

(A) is true but (R) is false

b

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

c

Both (A) and (R) are false

d

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 PH of the acid solution is always less than 7.

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

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