NEET Physics Thermal Properties of Matter Questions Solved


One kilogram of ice at 0°C is mixed with one kilogram of water at 80°C. The final tem perature of the mixture is (Take Specific heat of water 4200 Jkg1 k-1, Latent heat of ice 336 kJ kg) (A) 0°C (C) 40°C (B) 50°C (D) 60°C

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80 g of water at 30°C is poured on a large of ice at 0°C. The mass of ice that melts is 

1.  15 g

2.  30 g

3.  50 g

4  60 g

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The fastest mode of heat transfer is 

1.  Conduction

2.  Radiation

3.  Convection

4.  all are  equally fast

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A temperature of 100°F Farenhiet scale is equal to TK Kelvin scale. The value of T is

1.  310.9

2.  37.8

3.  100

4.  122.4

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A black body at temperature 300K radiates heat at the rate E. If its temperature is increased by 600k, the rate of radiation will increase to

1.  16E

2.  64E

3.  81E

4.  256E

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A body cools down from 80°C to 70°C in 5 minutes. the temperature of the body will fall from 70°C to 60°C in a time

1.  Less than 5 minutes

2.  equal to 5 minutes

3.  More than 5 minutes

4.  Can't say anything like the temperature of surrounding is not known

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If λm is the wavelength, corresponding to which the radiant intensity of a block body is maximum and its absolute temperature is T. Whichof the following graph correctly represents the variation of λm with T1.  

2.  

3.  

4.  

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If 48 gm of O3 at 27°C is mixed with 64 gm of O2 at 327°C in an adiabatic vessel as shown in the figure, then the final temperature of the mixture will be

                            

1.  200°C

2.  227°C

3.  314.5°C

4.  235.5°C

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Heat capacity is equal to the product of:

1.  mass and gas constant

2.  mass and specific heat

3.  latent heat and volume of water

4.  mass and Avogadro number

 

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