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This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
1. |
Select the correct statement for melting of any substance. |
A. | It occurs at the same temperature as that of vapourization |
B. | It is exothermic in nature |
C. | It occurs at 100 C |
D. | It requires heat to be supplied to the substance |
Answer» E. | |
2. |
Condensation temperature is the same as evaporation temperature. True or False? |
A. | True |
B. | False |
Answer» B. False | |
3. |
If 5g of a solid requires 30cal of heat to change into liquid at the same temperature, calculate the latent heat of fusion in cal/g. |
A. | 150 |
B. | 0.167 |
C. | 6 |
D. | 3 |
Answer» D. 3 | |
4. |
Getting burnt by steam is less dangerous than boiling water. True or False? |
A. | True |
B. | False |
Answer» C. | |
5. |
What happens to the boiling point of water in a container when the container is completely closed by a lid? |
A. | Increases |
B. | Decreases |
C. | Remains same |
D. | Boiling point is characteristic of a substance |
Answer» B. Decreases | |
6. |
What is regelation? |
A. | Refreezing of ice on addition of impurities |
B. | Refreezing of ice on reduction in pressure |
C. | Melting of ice at lower temperature than its melting point due to increase in pressure |
D. | Melting of ice at higher temperature than its melting point |
Answer» C. Melting of ice at lower temperature than its melting point due to increase in pressure | |
7. |
Melting point depends on pressure. True or False? |
A. | True |
B. | False |
Answer» B. False | |
8. |
Change of phase occurs at a constant temperature, which implies that even on addition of heat to a substance temperature remains constant. True or False? |
A. | True |
B. | False |
Answer» B. False | |