MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Same amount of heat is added to two substances of same mass having specific heat capacities s1 & s2 such that s1 > s2. Select the correct statement. |
| A. | The change in temperature of 1 is greater than the change in temperature of 2 |
| B. | The change in temperature of 1 is less than the change in temperature of 2 |
| C. | Both will have the same change in temperature |
| D. | Temperature changes can t be related with specific heat capacities |
| Answer» C. Both will have the same change in temperature | |
| 2. |
What should be the temperature of 1g of ice, so that when it s added to 9g of water, lowers the temperature of water by 10 C? Sw = 1cal/ g C, Sice = 0.5cal/ g C, Lfus= 80cal/g. |
| A. | 20 C |
| B. | -20 C |
| C. | 0 C |
| D. | 10 C |
| Answer» C. 0 C | |
| 3. |
30g water at 30 C is mixed with 1g of steam at 100 . Calculate the final temperature of the mixture. Sw = 1cal/ g C, Lvap= 540cal/g. |
| A. | 49.67 C |
| B. | 38.33 C |
| C. | 53.67 C |
| D. | 41.33 C |
| Answer» B. 38.33 C | |
| 4. |
The temperature of 50g of water has to be risen from 15 C to 85 C by using steam at 120 C. What is the amount of steam, in gms, required for the same? Sw= 1cal/ g C, Lvap = 540cal/g, Ssteam =0.48cal/g C. |
| A. | 6.29g |
| B. | 8.34g |
| C. | 7.22g |
| D. | 6.19g |
| Answer» E. | |
| 5. |
What is the definition of 1 calorie? |
| A. | It is the heat required to raise the temperature of 1g of water from 14.5 C to 15.5 C at 760mm Hg |
| B. | It is the heat required to raise the temperature of 1g of any substance by 14.5 C to 15.5 C at 760mm Hg |
| C. | It is the heat required to raise temperature of 1g of water by 1 C at 760mm Hg |
| D. | It corresponds to the heat supplied at 760mm Hg for 1 C raise in temperature |
| Answer» B. It is the heat required to raise the temperature of 1g of any substance by 14.5 C to 15.5 C at 760mm Hg | |
| 6. |
What is the principle of a calorimeter? |
| A. | Heat loss rate is directly proportional to temperature difference |
| B. | The total heat lost by a hot body is same as the total heat gained by the cold body provided no heat is lost to the surroundings |
| C. | Heat loss depends only on specific heat of a substance |
| D. | For the same amount of heat flow from a sample to two different samples of same mass is a product of their specific heats and temperature difference |
| Answer» C. Heat loss depends only on specific heat of a substance | |
| 7. |
A calorimeter does not involve measurement of temperature. True or False? |
| A. | True |
| B. | False |
| Answer» C. | |