The equilibrium reaction that doesn't have equal values for Kc and Kp is:
1. \(2NO(g) \rightleftharpoons N_2(g) + O_2(g)\)
2. \(SO_2(g) + NO_2(g) \rightleftharpoons SO_3(g) + NO(g)\)
3. \(H_2(g) + I_2(g) \rightleftharpoons 2HI (g)\)
4. \(2C(s) + O_2(g) \rightleftharpoons 2CO_2(g)\)
In a buffer solution containing an equal concentration of B- and HB, the Kb for B- is 10-10. pH of the buffer solution is:
1. | 10 | 2. | 7 |
3. | 6 | 4. | 4 |
Which of the following molecular hydrides acts as a Lewis acid?
1.
2.
3.
4.
The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence:
1.
2.
3.
4.
The ionization constant of ammonium hydroxide is 1.77 x 10-5 at 298 K. Hydrolysis constant of ammonium Chloride is:
1. 5.65 x 10-10
2. 6.50 x 10-12
3. 5.65 x 10-13
4. 5.65 x 10-12
What is the [OH-] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?
1. 0.10 M
2. 0.40 M
3. 0.0050 M
4. 0.12 M
The dissociation constants for acetic acid and HCN at 25 °C are 1.5 x 10-5 and 4.5 x 10-10, respectively. The equilibrium constant for the equilibrium,
CN- + CH3COOH ⇌ HCN + CH3COO-
would be:
1.
2.
3.
4.
Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture?
1.
2.
3.
4.
If the concentration of OH ' ions in the reaction
1. 8 times
2. 16 times
3. 64 times
4. 4 times