- 1(current)
Q. No.Then, the ratio of \(\frac{[CH_3CH_2COO^-]}{[CH_3CH_2COOH]}\) is-
(Given \(K_a=10^{-5} \))
1. 0.1
2. 10
3. 0.2
4. 20
The pH of an ammonium phosphate solution, if the pKa of phosphoric acid and the pKb of ammonium
hydroxide are 5.23 and 4.75 respectively, is:
| 1. | 8 | 2. | 6 |
| 3. | 7 | 4. | 10 |
Arrange the following solution in the decreasing order of pOH :
(A). 0.01 M HCl
(B). 0.01 M NaOH
(C). 0.01 M
(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)
The \(p K_a\) of a weak acid (HA) and \(p K_b\) of a weak base (BOH) are 3.2 and 3.4, respectively.
The pH of their salt (AB) solution is:
1. 7.0
2. 1.0
3. 7.2
4. 6.9
The amount of water in litres that must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2, is:
1. 2.0 L
2. 9.0 L
3. 0.1 L
4. 0.9 L
(Given: log 2 = 0.30, log 3 = 0.48, log 5 = 0.70, log 7 = 0.84, log 11 = 1.04)
1. 1.14
2. 1.78
3. 2.34
4. 3.02
The pH of the solution obtained by mixing 600 mL of 0.04 M HCl and 400 mL of 0.02 M H2SO4 is:
[log 4 = 0.6]
1. 3.4
2. 5.4
3. 1.4
4. 2.4
1. Decreased by 3
2. Increased by 3
3. There is no change in pH
4. Decreased by 1
- 1(current)
Q. No.
© 2025 GoodEd Technologies Pvt. Ltd.