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Airforce Group X Quiz || Physics || Heat & Thermodynamics

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Question 1

One mole of an ideal gas heated by law where P is pressure of gas, V is volume, α is a constant. The heat capacity of gas in the process is-

Question 2

A thermodynamic process of one mole ideal monoatomic gas is shown in figure. The efficiency of cyclic process ABCA will be :

Question 3

The internal energy of an ideal gas decreases by the same amount as the work done by the system

Question 4

Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium M1 = 4g and that of hydrogen M2 = 2g .The equivalent molar mass of the mixture is

Question 5

Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium M1 = 4g and that of hydrogen M2 = 2g .The equivalent degree of freedom f of the mixture is

Question 6

Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium M1 = 4g and that of hydrogen M2 = 2g. If the internal energy of He sample of 100J and that of the hydrogen sample is 200 J, then the internal energy of the mixture is

Question 7

An ideal gas undergoes the process 1 2 as shown in the figure, the heat supplied and work done in the process is ΔQ and ΔW respectively. The ratio ΔQ : ΔW is

Question 8

A reversible adiabatic path on a P-V diagram for an ideal gas passes through state A where P = 0.7 × 105 N/m-2 and V = 0.0049 m3. The ratio of specific heat of the gas is 1.4. The slope of path at A is :

Question 9

An ideal gas expands from volume V1 to V2. This may be achieved by either of the three processes : isobaric, isothermal and adiabatic, Let ΔU be the change in internal energy of the gas, Q be the quantity of heat added to the system and W be the work done by the system on the gas. Identify which of the following statements is false for ΔU?

Question 10

In an isobaric expansion of an ideal gas, which of the following is zero ?
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Aug 27CDS & Defence Exams