MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Two complexes A and B have dissociation constants 1.0 x 10-12 and 4.7 x 10-14 respectively. Which complex will be more stable? |
| A. | A |
| B. | B |
| C. | Both are equally stable |
| D. | Cannot be determined |
| Answer» C. Both are equally stable | |
| 2. |
For a particular complex, the dissociation equilibrium constant is given as 2.3 x 10-9. What will be the overall stability constant for this complex? |
| A. | 4.35 x 10<sup>-10</sup> |
| B. | 4.35 x 10<sup>10</sup> |
| C. | 4.35 x 10<sup>-8</sup> |
| D. | 4.35 x 10<sup>8</sup> |
| Answer» E. | |
| 3. |
If is the formation constant, then the instability constant = ________ |
| A. | 1 |
| B. | 1 |
| C. | (1/ ) |
| D. | log( ) |
| Answer» D. log( ) | |
| 4. |
If the values of stepwise stability constants for a series of successive reactions are logK1 = 4, logK2 = 3.2, logK3 = 2.7 and logK4 = 2, what is the value of 4? |
| A. | 11.9 |
| B. | 7.94 x 10<sup>11</sup> |
| C. | 1.47 x 10<sup>5</sup> |
| D. | 27.4 |
| Answer» C. 1.47 x 10<sup>5</sup> | |
| 5. |
How are the stepwise stability constants (K) related to the overall stability constant ( )? |
| A. | <sub>n</sub> = K<sub>1</sub> + K<sub>2</sub> + . + K<sub>n</sub> |
| B. | <sub>n</sub> = K<sub>1</sub> x K<sub>2</sub> x x K<sub>n</sub> |
| C. | <sub>n</sub> = logK<sub>1</sub> + logK<sub>2</sub> + . + logK<sub>n</sub> |
| D. | <sub>n</sub> = 1/(K<sub>1</sub> + K<sub>2</sub> + . + K<sub>n</sub>) |
| Answer» C. <sub>n</sub> = logK<sub>1</sub> + logK<sub>2</sub> + . + logK<sub>n</sub> | |
| 6. |
The degree of ________ between the metal ion and the ligand directly influences the stability of the complex in solution. |
| A. | association |
| B. | dissociation |
| C. | ionisation |
| D. | freedom |
| Answer» B. dissociation | |