MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Phase Transformation knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The condition for equilibrium in a heterogeneous system containing two phases can also be expressed using the_____________ |
| A. | Lever s concept |
| B. | Raoults rule |
| C. | Henrys rule |
| D. | Activity concept |
| Answer» E. | |
| 2. |
What happens when the two Gibbs energy curves for the - and -phases have a common tangent and the equilibrium has been established? |
| A. | Driving force for diffusion increases |
| B. | Driving force for diffusion decreases |
| C. | Driving force for diffusion remains constant |
| D. | Driving force first decreases then increases |
| Answer» B. Driving force for diffusion decreases | |
| 3. |
Calculate the number of phases present in a system in equilibrium, if the degree of freedom is 1, the number of components and non-compositional variables are 1 and 2 respectively? |
| A. | 1 |
| B. | 3 |
| C. | 0 |
| D. | 2 |
| Answer» E. | |
| 4. |
In heterogeneous systems containing more than one phase the pure components can, at least theoretically, exist in different crystal structures. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Which among the following condition the most stable state of a system should satisfy so that it can be defined as a state in which pure component has unit activity? |
| A. | Highest free energy |
| B. | Lowest free energy |
| C. | Change in Gibbs energy 0 |
| D. | Positive free energy |
| Answer» C. Change in Gibbs energy 0 | |
| 6. |
The first step in drawing the free energy curve of the FCC phase is, to convert the stable BCC arrangement of atoms into ____________ |
| A. | An unstable FCC arrangement |
| B. | A stable FCC arrangement |
| C. | A metastable BCC arrangement |
| D. | An unstable BCC arrangement |
| Answer» B. A stable FCC arrangement | |
| 7. |
In a general sense it is not possible to obtain any information about kinetics or the morphology of the phase mixture from the phase diagram. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
The driving force for the phase transformation increases in proportion to__________ |
| A. | Microstructure |
| B. | Change in composition |
| C. | Degree of undercooling below critical temperature |
| D. | Melting point |
| Answer» D. Melting point | |
| 9. |
Properties of metallic material primarily depends on _____________ |
| A. | Processing |
| B. | Type of crystal structure |
| C. | Microstructure |
| D. | Grain size |
| Answer» B. Type of crystal structure | |
| 10. |
Which rule gives the relative number of moles of and that must be present, if the overall composition is given as some X? ( , are stable forms of 2 substance) |
| A. | Richard s Rule |
| B. | Raoul s Rule |
| C. | Henry s Rule |
| D. | Lever rule |
| Answer» E. | |