Thermal Physics

Temperature is the average ---------- of the molecules of a substance

• a ) difference in K.E and P.E

• b) Sum of K.E and P.E

• c) Difference in T.E and P.E

• d) Difference in K.E and P.E

If a substance is cooled or heated , the change in mass of the substance is

• a) positive

• b) negative

• c) Zero

• d) none of the above

The value of Universal gas constant

• a) 3.81 J/mol/K

• b) 8.03 J/mol/K

• c) 1.38 J / mol /K

• d) 8.31 J/ mol/K

------------------ is the total number of atoms per mole of the substance

• a)Avogadro's number

• b)mole

• c)none

• d)both a and b

Boltzmann constant

• 1.38 x 10 ^-23 JK

• 1.38 x 10 ^-23 J/K

• 138 x 10 ^-23 JK

• 138 x 10 ^-23 J /K

The SI unit of heat energy absorbed or evolved is

• Kelvin

• Joule

• JS

• JS^-1

If two bodies are in thermal equilibrium then , they will be at the -------- temperature

• same

• different

• either a or b

• none

-------------- kelvin is the absolute scale of temperature of the body

• one

• zero

• none

• 273

All living organisms need a particular ------------ for their survival

• Temperature

• Pressure

• Volume

• none

The temperature is higher for a ---------body than for a -------body

• hotter , chiller

• hotter , colder

• chiller , hotter

• chiller , hotter