| 1 |
Almost forward reaction is complete when value of Kc is |
- A. very high
- B. Very small
- C. Neither large nor very small
- D. No correlation
|
| 2 |
When small amount of acid or base is added to buffer, its pH. |
- A. Remain same
- B. Always increases
- C. Always decreases
- D. slightly increases or decreases
|
| 3 |
For which system does the equilibrium constant K<sub>c</sub>has units of (concentration)<sup>-1</sup> |
|
| 4 |
Kw for water at 0 oc is 0.1 x 10<sup>-34</sup> and at 100 <sup>o</sup>C 7.5 x 10<sup>-14</sup>, How many times dissociation of water increase from 0 <sup>o</sup>Cto 100 <sup>o</sup>C |
- A. 7.5 times
- B. 50 times
- C. 75 times
- D. 100 times
|
| 5 |
Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities. |
- A. Filtration
- B. Crystallization
- C. Common ion effect
- D. Chromatography
|
| 6 |
The unit of Kc for the reaction N2 +O2 = 2NO will be |
- A. mol dm-3
- B. mol-1 dm+3
- C. mol-2 dm+6
- D. No units
|
| 7 |
pH of rain water. |
- A. 7
- B. Slightly basic
- C. slightly acidic
- D. Highly basic
|
| 8 |
At equilibrium stage of chemical reaction |
- A. The concentration of reaction is equal to concentration of products
- B. The rate constant of forward reaction is equal to rate constant of backward reaction
- C. The rate of forward reaction is equal rate of backward reaction
- D. The energy of activation of forward step is equal to energy of activation of backward step
|
| 9 |
If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by |
- A. Change of temperature
- B. Change of pressure
- C. Change of concentration
- D. Catalyst
|
| 10 |
The effect of temperature on equilibrium was studied by |
- A. Lewis
- B. Van der wall
- C. Arrhenius
- D. Vant hoff
|