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a
If pOH of aq. solution at 70° C is 7, then solution will be acidic.
b
If H+concentration is decreased 100 times, pH of solution increases by 2 units.
c
If solution of CH3COONa(aq) is diluted then pH increases.
d
Buffer capacity remains constant with dilution.

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detailed solution

Correct option is B

(a) As T increases, then the value of Kw also increases.

(b) Diluting a buffer solution would decrease its buffer capacity.

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