Assertion: The aqueous solution of CF3COO−Na+ is more basic than the aqueous solution of CH3COO−Na+ for the same concentration of salt.
Reason: The salt derived from a weak acid and strong base hydrolyses to generate a basic solution.
A
Both Assertion and Reason are correct and Reason is the correct explanation of Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
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C
Assertion is correct but Reason is not correct
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D
Assertion is not correct but Reason is correct
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E
Both Assertion and Reason are not correct
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Solution
The correct option is D Assertion is not correct but Reason is correct For a aqueous solution of salt of weak acid and strong base. pH=7+0.5pKa+0.5logC Hence, pH will always greater than 7 and the solution will be basic. CF3COOH is stronger acid than CH3COOH. CF3COOH has higher Ka value and lower pKa value than CH3COOH. Hence, the aqueous solution of CF3COO−Na+ is less basic than the aqueous solution of CH3COONa+ for same concentration of salt.