MCQOPTIONS
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MCQOPTIONS
This section includes 78 Mcqs, each offering curated multiple-choice questions to sharpen your VITEEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Examine the two statements carefully and select the correct answer using the code given below.Statement I:It is a common observation that if we place a glass of ice-water on a table at room temperature, the ice-water will get warmer.Statement II:Heat is an energy that flows between a system and its environment because of the temperature difference between them. |
| A. | Both the statements are individually true and Statement II is the correct explanation of Statement I |
| B. | Both the statements are individually true but Statement II is not the correct explanation of Statement I |
| C. | Statement I is true but Statement II is false |
| D. | Statement I is false but Statement II is true |
| Answer» B. Both the statements are individually true but Statement II is not the correct explanation of Statement I | |
| 2. |
If the temperature of 10g of mercury (of specific heat capacity 140 Jkg-1K-1) is to be raised from 0°C to 100°C then how much heat (in J) is required? |
| A. | 1400 |
| B. | 1.4 × 104 |
| C. | 1.4 × 105 |
| D. | 140 |
| Answer» E. | |
| 3. |
"Good absorber of heat is good radiator of heat also" is |
| A. | Stefan's law |
| B. | Kirchhof's law |
| C. | Plank's law |
| D. | Wien's law |
| Answer» C. Plank's law | |
| 4. |
Outdoors on the winter, why does a piece of metal feel colder than piece of wood |
| A. | Metal is a good conductor of heat than wood |
| B. | Wood is a good conductor of heat than metal |
| C. | Wood conducts heat faster than metal |
| D. | Both the metals and wood are bad conductors of heat |
| Answer» B. Wood is a good conductor of heat than metal | |
| 5. |
At what temperature, Celsius and Fahrenheit readings will be same? |
| A. | +40° |
| B. | +20° |
| C. | -20° |
| D. | -40° |
| Answer» E. | |
| 6. |
A body cools from 61°C to 59°C in 4 minutes and from 51°C to 49°C in 6 minutes, then temperature of the room is |
| A. | 30°C |
| B. | 25°C |
| C. | 35°C |
| D. | 20°C |
| Answer» B. 25°C | |
| 7. |
273.15 Kelvin equals? |
| A. | -32° F |
| B. | -273.15°C |
| C. | 273.15°C |
| D. | 32° F |
| Answer» E. | |
| 8. |
-173.15°C equals ____________. |
| A. | 100 K |
| B. | -100 K |
| C. | 279 .67 Fahrenheit |
| D. | 179.67 Fahrenheit |
| Answer» B. -100 K | |
| 9. |
A glass vessel is filled with water to the rim and a lid is fixed to it tightly. Then it is left inside a freezer for hours. What is expected to happen? |
| A. | The water freezes to ice and the level of ice comes down |
| B. | The water in the glass vessel simply freezes to ice |
| C. | The glass vessel breaks due to expansion as water freezes to ice |
| D. | The water does not freeze at all |
| Answer» D. The water does not freeze at all | |
| 10. |
Optical phonons are generated when the atoms in a diatomic mlecule |
| A. | Vibrate in opposite directions, without shifting their centre of mass |
| B. | Vibrate in opposite directions, with a shift of their centre of mass |
| C. | Vibrate in same direction |
| D. | Vibrate in same direction with equal displacements, irrespective of their individual masses. |
| Answer» C. Vibrate in same direction | |
| 11. |
If a glass window pane weighing 10 kg is exposed to the sun and its temperature rises from 20°C to 70°C, then how much heat (in kJ) it must haveabsorbed? [Specific heat capacity of glass is 840 J/(kgK)] |
| A. | 4200 |
| B. | 840 |
| C. | 420 |
| D. | 8400 |
| Answer» D. 8400 | |
| 12. |
If a meter long brass scale expands by 0.45mm then by how much must be the temperature (in °C) have increased? (Coefficient of linear expansion forbrass is 1.8 x 10-5 K-1) |
| A. | 40 |
| B. | 50 |
| C. | 80 |
| D. | 25 |
| Answer» E. | |
| 13. |
At the triple point |
| A. | Matter solidifies |
| B. | Matter liquifies |
| C. | Matter sublimates |
| D. | Matter exists in equilibrium in all the three states (solid, liquid and gas) |
| Answer» E. | |
| 14. |
A liquid with coefficient of volume expansion γ is filled in a container of material having the coefficient of linear expansion α; if the liquid over flows on heating then- |
| A. | γ = 3α |
| B. | γ > 3α |
| C. | γ < 3α |
| D. | γ > 3α2 |
| Answer» C. γ < 3α | |
| 15. |
On a new scale of temperature called W scale, the freezing and boiling points of water are 39°W and 239°W respectively. What will be the temperature on the new scale, corresponding to a temperature of 39°C? |
| A. | 200°W |
| B. | 139°W |
| C. | 78°W |
| D. | 117°W |
| Answer» E. | |
| 16. |
Absolute temperature of 77 K = ________, approximately. |
| A. | -196°C |
| B. | 350°C |
| C. | 77°F |
| D. | None of these |
| Answer» B. 350°C | |
| 17. |
In which one of the following materials the heat propagation is minimum due to conduction heat transfer? |
| A. | Lead |
| B. | Copper |
| C. | Water |
| D. | Air |
| Answer» E. | |
| 18. |
At STP, 11.2 × 103 m3 of a gas requires 104.6 J of heat to raise its temperature by 10 degrees.Then the Cv for the gas is |
| A. | 20.92 J deg-1 mol-1 |
| B. | 10.46 J deg-1 mol-1 |
| C. | 9.40 J deg-1 mol-1 |
| D. | None of the above |
| Answer» E. | |
| 19. |
An object temperature is raised by 150°C. The resulting increase in its absolute temperature is |
| A. | 32 K |
| B. | 150 K |
| C. | 180 K |
| D. | 373 K |
| Answer» C. 180 K | |
| 20. |
A mixture contains 1 mole of helium (CP = 2.5 R, CV = 1.5 R) and 1 mole of hydrogen (CP = 3.5 R, CV = 2.5 R). The value of CP for the mixture is |
| A. | 2R |
| B. | 3R |
| C. | \(\dfrac{5}{2}R\) |
| D. | \(\dfrac{7}{2}R\) |
| Answer» C. \(\dfrac{5}{2}R\) | |
| 21. |
30̊ Celcius = ______ Kelvin (approximately) |
| A. | - 243 |
| B. | - 30 |
| C. | 130 |
| D. | 303 |
| Answer» E. | |
| 22. |
CP / CV for a rigid diatomic gas is _________. |
| A. | 5 / 7 |
| B. | 7 / 5 |
| C. | 3 / 2 |
| D. | 2 / 3 |
| Answer» C. 3 / 2 | |
| 23. |
If 600 ml of water at 60°C is mixed with 250 ml of water at 26°C, then what would be the final temperature (in°C) of the mixture |
| A. | 38°C |
| B. | 50°C |
| C. | 42°C |
| D. | 46°C |
| Answer» C. 42°C | |
| 24. |
A polished metal plate has rough and black spot. It is heated to 1400 K and brought immediately in dark room. Then |
| A. | The spot will appear darker than the plate |
| B. | The spot will appear equally bright |
| C. | The spot will appear darker and brighter than the plate periodically |
| D. | The spot will appear brighter than the plate |
| Answer» E. | |
| 25. |
Find the heat (in J) required to vaporise 20 g of ethyl alcohol kept at its boiling point? (Latent heat of vapourisation of ethyl alcohol is 8.5 x 105 J/kg) |
| A. | 1700 |
| B. | 17000 |
| C. | 4250 |
| D. | 425 |
| Answer» C. 4250 | |
| 26. |
Radiations coming from the Sun are mostly in the form of |
| A. | light only. |
| B. | light and long wavelength infrared. |
| C. | light and short wavelength infrared. |
| D. | both short and long wavelength infrared. |
| Answer» E. | |
| 27. |
Heat is the form of energy transferred between two (or more) systems or a system and its surroundings by virtue of _____________ difference. |
| A. | temperature |
| B. | energy |
| C. | heat capacity |
| D. | specific heat capacity |
| Answer» B. energy | |
| 28. |
______ is a mode of heat transfer by actual motion of matter. |
| A. | Convection |
| B. | Radiation |
| C. | Vaporisation |
| D. | Conduction |
| Answer» B. Radiation | |
| 29. |
If 100g of iron at 20°C is given 2250 joules of heat then its temperature will rise to _________ °C. [Specific heat capacity of iron is 450 J/(kgK)] |
| A. | 50 |
| B. | 90 |
| C. | 70 |
| D. | 30 |
| Answer» D. 30 | |
| 30. |
An ic engine has a bore and a stroke length of 4 cm each. The total surface area through which heat transfer takes place in cm2 is. |
| A. | 18π |
| B. | 24π |
| C. | 28π |
| D. | 8π |
| Answer» C. 28π | |
| 31. |
A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. What would be the corresponding reading in a Celsius thermometer? |
| A. | 574 |
| B. | 301 |
| C. | 273 |
| D. | 232 |
| Answer» C. 273 | |
| 32. |
Identify the correct statement from among the following: |
| A. | Clinical Thermometer can be used to measure the temperature of boiling liquids. |
| B. | Room thermometers have a range from 30°C to 100°C |
| C. | Laboratory thermometers have a range from 35°C to 42°C. |
| D. | The range of a laboratory thermometer is greater than that of a clinical thermometer. |
| Answer» E. | |
| 33. |
A perfect blackbody is one which |
| A. | is black in colour |
| B. | reflects all heat |
| C. | transmits all heat radiations |
| D. | absorbs all incoming light and and reflect at all. |
| Answer» E. | |
| 34. |
Perspiration cools the body because |
| A. | Presence of water on the skin is cooling |
| B. | Evaporation requires latent heat |
| C. | Water has a high specific heat |
| D. | Water is a poor conductor of heat |
| Answer» C. Water has a high specific heat | |
| 35. |
If the temperature of a patient is 40°C then what will be his temperature on Fahrenheit Scale? |
| A. | 104°F |
| B. | 98°F |
| C. | 108°F |
| D. | 106°F |
| Answer» B. 98°F | |
| 36. |
Numerically two thermometers, one in Fahrenheit scale and another in Celsius scale shall read same at |
| A. | -40° |
| B. | 0° |
| C. | -273° |
| D. | 100° |
| Answer» B. 0° | |
| 37. |
If we place our hand near a lighted electric bulb, it feels warm. This is because |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Radiation and convection |
| Answer» E. | |
| 38. |
Heat transfers by the process of convection occurs |
| A. | only in liquids |
| B. | only in solids |
| C. | only in liquids and gases |
| D. | in solids, liquids and gases |
| Answer» D. in solids, liquids and gases | |
| 39. |
A measured temperature in Fahrenheit scale is 200° F. What will be its value in Celsius scale? |
| A. | 93.3°C |
| B. | 40°C |
| C. | 99°C |
| D. | 30°C |
| Answer» B. 40°C | |
| 40. |
An aluminium can of mass 2.0 g contains 48.0g of ice at 0°C. Now, 75g of water at 80°C poured into the can. Then, the final temperature is (specific heat of Aluminium is 0.2 cal/g-°C, latent heat of ice = 80 cal/g) |
| A. | 10°C |
| B. | 17.5°C |
| C. | 20°C |
| D. | 35.5°C |
| Answer» C. 20°C | |
| 41. |
Coefficient of cubical expansion of water is minimum at - |
| A. | 0° C |
| B. | 4°C |
| C. | 15.5°C |
| D. | 100°C |
| Answer» C. 15.5°C | |
| 42. |
In which of the following phenomena do heat waves travel along a straight line with the speed of light? |
| A. | Thermal conduction |
| B. | Thermal convection |
| C. | Thermal radiation |
| D. | Both, thermal conduction and radiation |
| Answer» D. Both, thermal conduction and radiation | |
| 43. |
Consider a surface at 0°C that may be assumed to be a black body in an environment at 25°C. If 300 W/m2 of radiation is incident on the surface the radiosity of this black surface is: |
| A. | 0 W/m2 |
| B. | 132 W/m2 |
| C. | 300 W/m2 |
| D. | 315 W/m2 |
| Answer» E. | |
| 44. |
0 Kelvin equals? |
| A. | 459.67° F |
| B. | - 659.67° F |
| C. | - 273.15 °C |
| D. | 0 °C |
| Answer» D. 0 °C | |
| 45. |
A diathermic wall between two thermodynamic systems _________. |
| A. | does not allow matter to pass but allows heat to pass across it. |
| B. | does not allow heat or matter to pass across it |
| C. | allows both heat or matter to pass across it at constant temperature. |
| D. | does not allow heat to pass across it but allows matter to pass. |
| Answer» B. does not allow heat or matter to pass across it | |
| 46. |
20 °C equals ________. |
| A. | 168° Fahrenheit |
| B. | 253.15 K |
| C. | 313.15 K |
| D. | 68° Fahrenheit |
| Answer» E. | |
| 47. |
If heat falls on an object, then: |
| A. | The whole heat is reflected only |
| B. | the whole heat is absorbed only |
| C. | the whole heal is transmitted only |
| D. | the heat may be absorbed, reflected and transmitted. |
| Answer» E. | |
| 48. |
If 'αL' and 'αV' are the coefficients of linear and volume thermal expansion respectively, then the correct relationship between them is _____________. |
| A. | αV = 1/3 × αL |
| B. | αV = αL3 |
| C. | αV = 3 × αL |
| D. | αV = αL1/3 |
| Answer» D. αV = αL1/3 | |
| 49. |
10 g of ice at - 10°C is mixed with 10 g of water at 0°C. The amount of heat required to raise the temperature of mixture to 10°C is |
| A. | 400 cal |
| B. | 550 cal |
| C. | 1050 cal |
| D. | 1200 cal |
| Answer» D. 1200 cal | |
| 50. |
If 1 litre of water is heated from 4°C to 44°C how much will it expand (in cm3)? (Coefficient of volume expansion for water is 20 × 10-5 K-1) |
| A. | 8 |
| B. | 10 |
| C. | 80 |
| D. | 100 |
| Answer» B. 10 | |