- 1(current)
Q. No.Two identical beakers \(A\) and \(B\) contain equal volumes of two different liquids at \(60^\circ\text{C}\) each and left to cool down. Liquid in \(A\) has density of \(8 \times 10^2 ~\text{kg/m}^{3}\) and specific heat of \(2000~\text{Jkg}^{-1} ~\text{K}^{-1}\) while liquid in \(B\) has density of \(10^3 ~\text{kgm}^{-3}\) and specific heat of \(4000~\text{Jkg}^{-1} \text{K}^{-1}\). Which of the following best describes their temperature versus time graph schematically? (assume the emissivity of both the beakers to be the same)
| 1. |  |
2. |  |
| 3. |  |
4. |  |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
| 1. | \(12\) | 2. | \(14\) |
| 3. | \(16\) | 4. | \(18\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| A. | When small temperature difference between a liquid and its surrounding is doubled the rate of loss of heat of the liquid becomes twice. |
| B. | Two bodies P and Q having equal surface areas are maintained at temperature 10ºC and 20 ºC. The thermal radiation emitted in a given time by P and Q are in the ratio 1 : 1.15 |
| C. | A car engine working between 100 K and 400 K has an efficiency of 75% |
| D. | When small temperature difference between a liquid and its surrounding is quadrupled, the rate of loss of heat of the liquid becomes twice. |
Choose the correct answer from the options given below:
| 1. | A, B, C only |
| 2. | A, B only |
| 3. | A, C only |
| 4. | B, C, D only |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(Assume Newton’s law of cooling is valid)
1. \(1\) min
2. \(1.4\) min
3. \(2\) min
4. \(3.2\) min
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. \(16^\circ \mathrm{C}\)
2. \(20^\circ \mathrm{C}\)
3. \(28^\circ \mathrm{C}\)
4. \(36^\circ \mathrm{C}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(Assume Newton's law of cooling to be valid.)
| 1. | \({ 25 \over 3} ~\text {min}\) | 2. | \(5 ~\text {min}\) |
| 3. | \({ 25 \over 4} ~\text {min}\) | 4. | \(9~ \text {min}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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