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Thermodynamics JEE Advanced Questions. We covered all the Thermodynamics JEE Advanced Questions in this post for free so that you can practice well for the exam.
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Mock test on Thermodynamics for Students
Which law states that substances that absorb Heat well also emit Heat efficiently?
(a) Stefan’s Law
(b) Kirchhoff’s Law
(c) Planck’s Law
(d) Wien’s Law
Option b – Kirchhoff’s Law
When red glass is heated in a dark room, it appears
(a) Green
(b) Purple
(c) Black
(d) Yellow
Option a – Green
The blackboard appears black because it
(a) Reflects all colors
(b) Does not reflect any color
(c) Absorbs black color
(d) Reflects black color
Option b – Does not reflect any color
Assertion (A): Light-colored clothing is preferred in summer. Reason (R): Light colors absorb less Heat.
(a) Both A and R are true, and R correctly explains A
(b) Both A and R are true, but R does not explain A
(c) A is true, but R is false
(d) A is false, but R is true
Option a – Both A and R are true, and R correctly explains A
According to Newton’s Law of Cooling, the rate of cooling of a body is proportional to
(a) The temperature of the body
(b) The temperature of the surroundings
(c) The fourth power of the temperature of the body
(d) The difference between the body’s temperature and the surroundings
Option d – The difference between the body’s temperature and the surroundings
A hot object cools from 90°C to 75°C in 25 seconds. How long will it take to cool from 75°C to 60°C?
(a) 25 seconds
(b) Less than 25 seconds
(c) More than 25 seconds
(d) Cannot be determined
Option c – More than 25 seconds
The radiation emitted by a perfect black body is proportional to
(a) Temperature on the ideal gas scale
(b) Fourth root of temperature
(c) Fourth power of temperature
(d) Square root of temperature on the ideal gas scale
Option c – Fourth power of temperature
The relationship between the color and temperature of a star is given by
(a) Wien’s Displacement Law
(b) Planck’s Law
(c) Hubble’s Law
(d) Fraunhofer’s Diffraction Law
Option a – Wien’s Displacement Law
The brightness of a star depends on
(a) Size and temperature
(b) Size and distance from Earth
(c) Size, temperature, and Mass
(d) Size, temperature, and distance from Earth
Option a – Size and temperature
The reflective coating inside a thermos flask is used to prevent Heat transfer by
(a) Convection
(b) Conduction
(c) Both convection and conduction
(d) Radiation
Option d – Radiation
Which statement about a thermos flask is incorrect?
(a) The flask walls are separated by a vacuum and made of glass, a poor conductor of Heat
(b) The glass walls have shiny surfaces
(c) The inner wall radiates a lot of Heat and the outer wall absorbs some of it
(d) Cork supports are poor conductors of Heat
Option c – The inner wall radiates a lot of Heat and the outer wall absorbs some of it
The total radiant energy emitted per unit area per second is called
(a) Emissive power
(b) Absorptive power
(c) Electric power
(d) None of the above
Option a – Emissive power
An example of an ideal black body is
(a) Kajal
(b) Blackboard
(c) A pinhole in a box
(d) None of the above
Option c – A pinhole in a box
A perfect black body has an emissive power of
(a) Maximum
(b) Zero
(c) Unity
(d) Minimum
Option c – Unity
Which of the following does not require a medium?
(a) Radiation
(b) Convection
(c) Conduction
(d) None of the above
Option a – Radiation
Which process is not associated with long-wave radiation?
(a) Conduction
(b) Scattering
(c) Convection
(d) Radiation
Option a – Conduction
Heat waves that travel in a straight line at the speed of Light occur in
(a) Thermal conduction
(b) Thermal convection
(c) Thermal radiation
(d) Both conduction and radiation
Option c – Thermal radiation
Why are dewdrops less likely to form on cloudy nights?
(a) Clouds absorb radiation from Earth’s surface
(b) Clouds reflect back Earth’s radiation
(c) The surface temperature of Earth is lower on cloudy nights
(d) Clouds block the wind from reaching the ground
Option b – Clouds reflect back Earth’s radiation
Clear nights are colder than cloudy nights because of
(a) Conduction
(b) Condensation
(c) Radiation
(d) Insulation
Option c – Radiation
Solar radiation primarily consists of
(a) Light only
(b) Light and long-wavelength infrared
(c) Light and short-wavelength infrared
(d) Both short and long-wavelength infrared
Option b – Light and long-wavelength infrared
Heat transfer by convection occurs in
(a) Solids and liquids
(b) Solids and vacuum
(c) Gases and liquids
(d) Vacuum and gases
Option c – Gases and liquids
A liquid remains hot or cold for a long time in a thermos flask because heat loss by
(a) Conduction
(b) Convection and radiation
(c) Both conduction and convection/radiation
(d) None of the above
Option c – Both conduction and convection/radiation
We covered all the Thermodynamics JEE advanced Questions above in this post for free so that you can practice well for the exam.
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