1.

Which of the following comments are true-

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if `pK_a` value for the acids HA and HB are 4 and 5 respectively. Then the concentration of `OH^-` ions in 0.1(M) aqueous solution of HB will be GREATER that that in 0.1(M) aqueous solution of HA
pH of pure water at `0^(@)C` is smaller than that at `25^(@)C`
The degree of HYDROYSIS of `NH_4F` in its 0.1(M) and 0.2(M) aqueous solutions is the same ata PARTICULAR temperature
pH of an acid is 5 implying that the acid is weak

Answer :A::C


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