Q.

pH value of pure water at 0oC will be

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a

Greater than 7

b

Less than 7

c

7

d

All the three

answer is A.

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Detailed Solution

As temperature decreases Kw decreases.H+ concentration decreases pHbecomes greater than 7At 150C,  KW = 10-10. So at temperature below 250C  KW < 10-14∴    pH  >  7 (for neutral solution or pure water)
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