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Arrange the following solution in the decreasing order pf pOH : (A) 0.01 M HCl (B) 0.01 M NaOH (C) 0.01 M CH3COONa (D) 0.01 M NaCl
- (1) (B) > (C) > (D) > (A)
- (2) (A) > (C) > (D) > (B)
- (3) (B) > (D) > (C) > (A)
- (4) (A) > (D) > (C) > (B)
Correct answer: (1) (B) > (C) > (D) > (A)
Solution
The correct option ranks the solutions based on their pOH values, which are determined by their concentrations of hydroxide ions. Since 0.01 M NaOH is a strong base, it has the lowest pOH, while 0.01 M HCl, a strong acid, has the highest pOH, making the order (B) > (C) > (D) > (A) accurate.
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