The solubility product for a salt of type AB is . The molarity of its standard solution will be:
1.
2.
3.
4.
The ionization constant of chloroacetic acid is 1.35 × 10–3. The pH of a 0.1 M acid solution will be:
1. | 1.94
|
2. | 6.14
|
3. | 3.23
|
4. | 5.64 |
0.561 g of KOH is dissolved in water to give 200 mL of solution at 298 K. The pH of the solution will be
1. | 12.70 | 2. | 1.30 |
3. | 3.14 | 4. | 11.70 |
The concentration of hydrogen ion in a sample of soft drink is . The pH of the soft drink will be:
1. 3.14
2. 2.42
3. 11.58
4. 6.00
(a) PCl5 (g) PCl3 (g) + Cl2 (g)
(b) CaO (s) + CO2 (g) CaCO3 (s)
(c) 3Fe (s) + 4H2O (g) Fe3O4 (s) + 4H2 (g)
The effect of an increase in the volume on the number of moles of products in the above-mentioned reactions would be, respectively:
1. a) Increase, b) decrease, c) same
2. a) Decrease, b) same, c) increase
3. a) Increase, b) increase, c) same
4. a) Increase, b) decrease, c) increase
For the given reaction:
PCl5 (g) PCl3 (g) + Cl2 (g), ∆rH° = 124.0 kJ mol–1 and Kc = 8.3 10-3 mol L-1 at 473 K
The effect on Kc if (i) pressure is increased and (ii) the temperature is increased will be, respectively-
1. (i) Will increase; (ii) will decrease
2. (i) Will decrease; (ii) will remain the same
3. (i) Will remain the same; (ii) will increase
4. (i) will remain the same; (ii) Will decrease
The conjugate bases for Brönsted acids, H2SO4, and HCO3- will be, respectively:
1. ,
2. HSO4-, CO3-
3. SO4-2, CO32-
4. HS2O4-, CO32-
OH– , F– , H+ and BCl3
The species described above that contain Lewis acids are:
1. BCl3 and F-
2. OH– and F-
3. H+and BCl3
4. F- and BCl3
The first ionization constant of H2S is 9.1 × 10–8. The concentration of HS– ion in its 0.1 M solution will be:
1. | 12.3 x 10-7 M | 2. | 11.4 x 10-6 M |
3. | 3.5 x 10-4 M | 4. | 9.54 x 10-5 M |
The ionization constant of acetic acid is 1.74 × 10–5. The pH of acetic acid in its 0.05 M solution will be:
1. | 7.81
|
2. | 3.03
|
3. | 8.54
|
4. | 1.45 |