NEET Questions - Physics - Thermodynamics

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A difference of temperature of $25 ^\circ C $ is equivalent to a difference of

$ 72 ^\circ F $
$ 45 ^\circ F $
$ 32 ^\circ F $
$ 25 ^\circ F $

What is the value of absolute temperature on the Celsius Scale ?

$ - 273 .15 ^\circ C $
$ 100 ^\circ C $
$ - 32 ^\circ C $
$ 0 ^\circ C $

The temperature of a substance increases by $ 27 ^\circ $ What is the value of this increase of Kelvin scale ?

300 K
2-46 K
7K
27 K

At Which temperature the density of water is maximum?

$ 4 ^\circ F$
$ 42 ^\circ F$
$ 32 ^\circ F$
$ 39.2 ^\circ F$

The temperature on celsius scale is $ 25 ^\circ C $ . What is the corresponding temperature on the Fahrenheit Scale?

$ 40 ^\circ F $
$ 45 ^\circ F $
$ 50 ^\circ F $
$ 77 ^\circ F $

The temperature of a body on Kelvin Scale is found to be x.K.when it is measured by Fahrenhit thesmometes. it is found to be $x^0F$ , then the value of x is .

313
301.24
574-25
40

A Centigrade and a Fahrenhit thesmometes are dipped in boiling wates-The wates temperature is lowered until the Farenhit thesmometes registered $140 ^\circ $ what is the fall in thrmometers

$ 80 ^\circ $
$ 60 ^\circ $
$ 40 ^\circ $
$ 30 ^\circ $

A uniform metal rod is used as a bas pendulum. If the room temperature rises by $ 10 ^\circ C $ and the efficient of line as expansion of the metal ofthe rod is, $ 2 \times 10^{-6} 0_c^{-1} $ what will have percentage increase

$ -2 \times 10^{-3} $
$ 1 \times 10^{-3} $
$ -1 \times 10^{-3} $
$ 2 \times 10^{-3} $

A gas expands from 1 litre to 3 litre at atmospheric pressure. The work done by the gas is about

200 J
2 J
300 J
$ 2 \times 10^5 J $

Each molecule of a gas has f degrees of freedom. The radio $ { C_P \over C_V} = \gamma $ for the gas is

$ 1 + { f \over 2} $
$ 1 + { 1 \over f } $
$ 1 + { 2 \over f } $
$ 1 + { (f - 1) \over 3 } $

If the ratio of specific heat of a gas at Consgant pressure to that at constant volume is $ \gamma $ , the Change in internal energy of the mass of gas, when the volume changes from V to 2V at Constant Pressure p, is

$ { PV \over \gamma - 1 } $
$ { R \over \gamma - 1 } $
PV
$ { \gamma PV \over \gamma - 1 } $

The change in internal energy, when a gas is cooled from $ 927 ^\circ to 27 ^\circ C $

200%
100%
300%
400%

For hydrogen gas Cp - Cv = a and for oxygen gas Cp - Cv = b, The relation between a and b is given by

a =4b
a = b
a = 16 b
a = 8 b

In a thermodynamic process, pressure ofa fixed mass ofa gas is changed in such a manner that the gas release 20J of heat and 8J of work has done on the gas- If the inifial internal energy of the gas was 30j, then the final internal energy will be

58 J
2 J
42 J
18 J

If for a gas $ { Cp \over Cv } = 1.67 $ this gas is made up to molecules which are

diatomic
Polytomic
monoatomic
mixnese of diatomic and polytomic molecules

NEET Physics Questions: Thermodynamics