1.

At 25^(@)C, pK_b(NH)_3=4.74,pK_a(HF)=3.14 and pK_a(HCN)=9.4 Hence-

Answer»

AQUEOUS SOLUTION of `NH_4F` is acidic
aqueous solution of `NH_4CN` is acidic
the pH of an aqueous solution of `NH_4CN` is greater than that of an aqueous solution of `NH_4F`
the pH of an aqueous solution ofboth `NH_4CN`and `NH_4F` are INDEPENDENT of the CONCENTRATION of the solutions

Answer :A::C::D


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