NEET Chemistry MCQ: NCERT Ideal Gas Equation

🔄Ncert Concepts :Ideal Gas Law, Density, Molar Mass

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10 g each of ${\rm{C}}{{\rm{H}}_4}\,\,{\rm{and}}\,\,{{\rm{O}}_2}$ are kept in cylinders of same volume under same temperatures, give the pressure ratio of two gases

$2{\rm{ }}:{\rm{ }}1$

$1{\rm{ }}:{\rm{ }}4$

$2{\rm{ }}:{\rm{ }}3$

$3{\rm{ }}:{\rm{ }}4$

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🔄Ncert Concepts :Ideal Gas Law, Molar Mass, Mole Concept

An ideal gas undergoes a process in which its pressure P and volume V are related by $PV^n = constant$ , where n is a constant. If the gas expands adiabatically ( $n = \gamma$ , where $\gamma = C_P/C_V$ ), which of the following statements is TRUE regarding the work done by the gas?

The work done depends on both the initial and final temperatures.

The work done is zero.

The work done depends only on the initial temperature.

The work done depends only on the final temperature.

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🎓 Ncert Level:Analyzing

🔄Ncert Concepts :Ideal Gas Law, Adiabatic Process, Work Done, Heat Capacity

$5\,{\rm{g}}$ each of the following gases at $87\,^\circ C$ and $750\,{\rm{mm}}$ pressure are taken. Which of them will have the least volume?

${\rm{HF}}$

${\rm{HCl}}$

${\rm{HBr}}$

${\rm{HI}}$

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🔄Ncert Concepts :Ideal Gas Law, Molar Mass, Relationship between Volume and Molar Mass

When a sample of gas is compressed at constant temperature from 15 atm to 60 atm, its volume changes from $76\,\,{\rm{c}}{{\rm{m}}^3}\,\,{\rm{to}}\,\,20.5\,\,{\rm{c}}{{\rm{m}}^3}$ . Which of the following statements are possible explanations of this behaviour? 1. The gas behaves non-ideally. 2. The gas dimerises. 3. The gas is absorbed into the vessel walls.

$1,{\rm{ }}2,{\rm{ }}and{\rm{ }}\,3$

$1{\rm{ }}\,and{\rm{ }}\,2{\rm{ }}\,only$

$2{\rm{ }}\,and{\rm{ }}\,3{\rm{ }}\,only$

$1{\rm{ }}\,only$

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🎓 Ncert Level:Analyzing

🔄Ncert Concepts :Ideal Gas Law, Non-ideal Gas Behavior, Gas Compression, Dimerization, Adsorption

At relatively high pressure, van der Waals’ equation reduces to:

$PV = RT$

$PV = RT + a/V$

$PV = RT + Pb$

$PV = RT - a/{V^2}$

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🎓 Ncert Level:Understanding

🔄Ncert Concepts :van der Waals equation, ideal gas law, high pressure approximations

One poise is equal to:

$1\,\,{\rm{dyne}}\,\,{\sec ^{ - 2}}{\rm{cm}}$

$1\,\,{\rm{dyne}}\,\,\sec {\rm{c}}{{\rm{m}}^{{\rm{ - 2}}}}$

$1{\mkern 1mu} {\mkern 1mu} {\rm{dyne\,\,  }}{\sec ^{ - 1}}{\rm{  c}}{{\rm{m}}^{ - 2}}$

$1{\mkern 1mu} {\mkern 1mu} {\rm{dyne\,\,  }}{\sec ^{ - 1}}\,{\rm{ c}}{{\rm{m}}^{ - 1}}$

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🎓 Ncert Level:Remembering

🔄Ncert Concepts :viscosity, poise, units

The density of a gas is 1.964 g $d{m^{ - 3}}$ at 273 K and 76 cm Hg. The gas is

$C{H_4}$

${{\rm{C}}_2}{{\rm{H}}_6}$

${\rm{C}}{{\rm{O}}_2}$

${\rm{Xe}}$

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🔄Ncert Concepts :Ideal Gas Law, Density, Molar Mass

At what temperature will the average translational kinetic energy of a gas molecule be equal to the energy required to break a bond of energy 2 eV? (Boltzmann constant $k_B = 1.38 imes 10^{-23} J/K$ , $1 eV = 1.6 imes 10^{-19} J$ )

1.86 x 10 $^4$ K

3.72 x 10 $^4$ K

9.3 x 10 $^3$ K

2.48 x 10 $^4$ K

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🔄Ncert Concepts :Ideal Gas Law, Kinetic Molecular Theory, Energy, Unit Conversion

Oxygen gas generated by the decomposition of potassium chlorate is collected. The volume of oxygen collected at $24\,^\circ C$ and atmospheric pressure of 760 mm Hg is 128 mL. Calculated the mass of oxygen gas obtained. The pressure of the water vapour at $24\,^\circ C$ is 22.4 mm Hg

$0.123{\rm{ }}\,g$

$0.163{\rm{ }}\,g$

$0.352{\rm{ }}\,g$

$1.526{\rm{ }}\,g$

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