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Q.

Select the incorrect statement out of the following.

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a

Molar concentration of hydronium ion expressed in base 10 logarithmic scale is called PH scale.

b

PH of solution is the negative logarithm in base 10 of H+ ion activity aH+, numerical value of molarity of solution.

c

PH = -log10aH+=-logH+mol L-1

d

H3O+×OH- is 10-14 M2 for any aqueous solution at any temperature.

answer is D.

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Detailed Solution

The product H3O+×OH- is 10-14M2 for any aqueous solution, only at 298 K.*PH is commonly taken as -logH+
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