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question_answer1)
Postulate of kinetic theory is [EAMCET 1980]
A)
Atom is indivisible done
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B)
Gases combine in a simple ratio done
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C)
There is no influence of gravity on the molecules of a gas done
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D)
None of the above done
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question_answer2)
According to kinetic theory of gases, [EAMCET 1980]
A)
There are intermolecular attractions done
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B)
Molecules have considerable volume done
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C)
No intermolecular attractions done
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D)
The velocity of molecules decreases after each collision done
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question_answer3)
In deriving the kinetic gas equation, use is made of the root mean square velocity of the molecules because it is [Bihar MADT 1980]
A)
The average velocity of the molecules done
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B)
The most probable velocity of the molecules done
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C)
The square root of the average square velocity of the molecules done
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D)
The most accurate form in which velocity can be used in these calculations done
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question_answer4)
Kinetic energy of a gas depends upon its[Bihar MADT 1982]
A)
Molecular mass done
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B)
Atomic mass done
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C)
Equivalent mass done
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D)
None of these done
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question_answer5)
The kinetic theory of gases perdicts that total kinetic energy of a gaseous assembly depends on [NCERT 1984]
A)
Pressure of the gas done
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B)
Temperature of the gas done
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C)
Volume of the gas done
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D)
Pressure, volume and temperature of the gas done
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question_answer6)
According to kinetic theory of gases, the energy per mole of a gas is equal to [EAMCET 1985]
A)
1.5 RT done
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B)
RT done
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C)
0.5 RT done
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D)
2.5 RT done
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question_answer7)
Internal energy and pressure of a gas per unit volume are related as [CBSE PMT 1993]
A)
\[P=\frac{2}{3}E\] done
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B)
\[P=\frac{3}{2}E\] done
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C)
\[P=\frac{1}{2}E\] done
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D)
\[P=2E\] done
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question_answer8)
The translational kinetic energy of an ideal gas depends only on its
A)
Pressure done
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B)
Force done
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C)
Temperature done
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D)
Molar mass done
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question_answer9)
Helium atom is two times heavier than a hydrogen molecule at 298 K, the average kinetic energy of helium is [IIT 1982]
A)
Two times that of a hydrogen molecule done
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B)
Same as that of a hydrogen molecule done
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C)
Four times that of a hydrogen molecule done
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D)
Half that of a hydrogen molecule done
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question_answer10)
Which of the following is valid at absolute zero [Pb. CET 1985]
A)
Kinetic energy of the gas becomes zero but the molecular motion does not become zero done
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B)
Kinetic energy of the gas becomes zero and molecular motion also becomes zero done
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C)
Kinetic energy of the gas decreases but does not become zero done
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D)
None of the above done
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question_answer11)
The average K.E. of an ideal gas in calories per mole is approximately equal to [EAMCET 1989]
A)
Three times the absolute temperature done
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B)
Absolute temperature done
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C)
Two times the absolute temperature done
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D)
1.5 times the absolute temperature done
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question_answer12)
According to kinetic theory of gases, for a diatomic molecule [MNR 1991]
A)
The pressure exerted by the gas is proportional to the mean velocity of the molecules done
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B)
The pressure exerted by the gas is proportional to the root mean square velocity of the molecules done
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C)
The root mean square velocity is inversely proportional to the temperature done
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D)
The mean translational kinetic energy of the molecules is proportional to the absolute temperature done
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question_answer13)
At STP, 0.50 mol \[{{H}_{2}}\] gas and 1.0 mol He gas [CBSE PMT 1993, 2000]
A)
Have equal average kinetic energies done
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B)
Have equal molecular speeds done
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C)
Occupy equal volumes done
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D)
Have equal effusion rates done
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question_answer14)
Which of the following expressions correctly represents the relationship between the average molar kinetic energy, \[\overline{K.E.}\], of CO and \[{{N}_{2}}\] molecules at the same temperature [CBSE PMT 2000]
A)
\[{{\overline{KE}}_{CO}}={{\overline{KE}}_{{{N}_{2}}}}\] done
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B)
\[{{\overline{KE}}_{CO}}>{{\overline{KE}}_{{{N}_{2}}}}\] done
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C)
\[{{\overline{KE}}_{CO}}<{{\overline{KE}}_{{{N}_{2}}}}\] done
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D)
Cannot be predicted unless the volumes of the gases are given done
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question_answer15)
Indicate the correct statement for a 1-L sample of \[{{N}_{2}}(g)\] and \[C{{O}_{2}}(g)\] at 298 K and 1 atm pressure
A)
The average translational KE per molecule is the same in \[{{N}_{2}}\] and \[C{{O}_{2}}\] done
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B)
The rms speed remains constant for both \[{{N}_{2}}\] and \[C{{O}_{2}}\] done
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C)
The density of \[{{N}_{2}}\] is less than that of \[C{{O}_{2}}\] done
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D)
The total translational KE of both \[{{N}_{2}}\] and \[C{{O}_{2}}\] is the same done
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question_answer16)
With increase of pressure, the mean free path [Pb. CET 1985]
A)
Decreases done
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B)
Increases done
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C)
Does not change done
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D)
Becomes zero done
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question_answer17)
Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas [AIEEE 2005]
A)
The most probable speed increases done
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B)
The fraction of the molecules with the most probable speed increases done
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C)
The distribution becomes broader done
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D)
The area under the distribution curve remains the same as under the lower temperature done
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question_answer18)
If P, V, M, T and R are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the density is given by [CBSE PMT 1989, 91]
A)
\[\frac{RT}{PM}\] done
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B)
\[\frac{P}{RT}\] done
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C)
\[\frac{M}{V}\] done
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D)
\[\frac{PM}{RT}\] done
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question_answer19)
An ideal gas will have maximum density when [CPMT 2000]
A)
\[P=0.5\,atm,\,T=600\,K\] done
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B)
\[P=2\,atm,\,T=150\,K\] done
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C)
\[P=1\,atm,\,T=300\,K\] done
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D)
\[P=1.0\,atm,\,T=500\,K\] done
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question_answer20)
If the inversion temperature of a gas is \[-{{80}^{o}}C\], then it will produce cooling under Joule-Thomson effect at
A)
298 K done
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B)
273 K done
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C)
193 K done
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D)
173 K done
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question_answer21)
Ratio of \[{{C}_{p}}\] and \[{{C}_{v}}\] of a gas 'X' is 1.4. The number of atoms of the gas 'X' present in 11.2 litres of it at N.T.P. is [CBSE PMT 1989]
A)
\[6.02\times {{10}^{23}}\] done
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B)
\[1.2\times {{10}^{24}}\] done
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C)
\[3.01\times {{10}^{23}}\] done
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D)
\[2.01\times {{10}^{23}}\] done
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question_answer22)
The density of air is 0.00130 g/ml. The vapour density of air will be [DCE 2000]
A)
0.00065 done
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B)
0.65 done
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C)
14.4816 done
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D)
14.56 done
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question_answer23)
At \[{{100}^{o}}C\] and 1 atm, if the density of liquid water is 1.0 g \[c{{m}^{-3}}\] and that of water vapour is 0.0006 g \[{{m}^{-3}}\], then the volume occupied by water molecules in 1 litre of steam at that temperature is [IIT 2000]
A)
6 \[c{{m}^{3}}\] done
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B)
60 \[c{{m}^{3}}\] done
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C)
0.6 \[c{{m}^{3}}\] done
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D)
0.06 \[c{{m}^{3}}\] done
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question_answer24)
The ratio g for inert gases is [AFMC 1990]
A)
1.33 done
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B)
1.66 done
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C)
2.13 done
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D)
1.99 done
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question_answer25)
The density of neon will be highest at [CBSE PMT 1990]
A)
S.T.P. done
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B)
\[{{0}^{o}}C,\,2\,atm\] done
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C)
\[{{273}^{o}}C,\,1\,atm\] done
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D)
\[{{273}^{o}}C,\,2\,atm\] done
clear
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question_answer26)
Absolute zero is defined as the temperature [CBSE PMT 1990]
A)
At which all molecular motion ceases done
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B)
At which liquid helium boils done
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C)
At which ether boils done
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D)
All of the above done
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question_answer27)
Consider the following statements : (1) Joule-Thomson experiment is isoenthalpic as well as adiabatic. (2) A negative value of \[{{\mu }_{JT}}\] (Joule Thomson coefficient corresponds to warming of a gas on expansion. (3) The temperature at which neither cooling nor heating effect is observed is known as inversion temperature. Which of the above statements are correct
A)
1 and 2 done
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B)
1 and 3 done
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C)
2 and 3 done
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D)
1, 2 and 3 done
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question_answer28)
Vibrational energy is [Pb. CET 1985]
A)
Partially potential and partially kinetic done
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B)
Only potential done
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C)
Only kinetic done
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D)
None of the above done
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question_answer29)
At the same temperature and pressure, which of the following gases will have the highest kinetic energy per mole [MNR 1991]
A)
Hydrogen done
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B)
Oxygen done
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C)
Methane done
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D)
All the same done
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question_answer30)
Dimensions of pressure are the same as that of [CBSE PMT 1995]
A)
Energy done
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B)
Force done
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C)
Energy per unit volume done
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D)
Force per unit volume done
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question_answer31)
The density of a gas An is three times that of a gas B. if the molecular mass of A is M, the molecular mass of B is [CPMT 1987]
A)
3 M done
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B)
\[\sqrt{3}\]M done
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C)
\[M/3\] done
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D)
\[M/\sqrt{3}\] done
clear
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