Which of the following acid has a negative pka value
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a
CF3COOH
b
HCl
c
Picric acid
d
HF
answer is B.
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Detailed Solution
HClO4, HI, H2SO4, HBr, HCl, HNO3 are some very important examples of strong acids in aqueous solution.The acid must be stronger in aqueous solution than a hydronium ion, so its Pka must be lower than that of hydronium ion.∴ strong acids have negative Pka value.