A 2.5 gm impure sample containing weak monoacidic base (Mol. Wt = 45) is dissolved in 100 ml water and titrated with 0.5 M HCL when `((1)/(5))^(th)` of the base was neutralised the pH was found to be 9 and at equivalent point pH of solution is 4.5. Given : All data at `25^(@)C` & log2 = 0.3. Select correct statement(s).A. `k_(b)` of base is less that `10^(6)`B. Concentration of salt (C) at equivalent points is 100 mlC. Volume of HCl is used at equivalent point is 100 mlD. Weight percentage of base in given sample is 80%.

A 2.5 gm impure sample containing weak monoacidic base (Mol. Wt = 45)

1.	A 2.5 gm impure sample containing weak monoacidic base (Mol. Wt = 45) is dissolved in 100 ml water and titrated with 0.5 M HCL when `((1)/(5))^(th)` of the base was neutralised the pH was found to be 9 and at equivalent point pH of solution is 4.5. Given : All data at `25^(@)C` & log2 = 0.3. Select correct statement(s).A. `k_(b)` of base is less that `10^(6)`B. Concentration of salt (C) at equivalent points is 100 mlC. Volume of HCl is used at equivalent point is 100 mlD. Weight percentage of base in given sample is 80%.
Answer» Correct Answer - B::C

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