CBSE Questions for Class 11 Engineering Chemistry States Of Matter Quiz 1 - MCQExams.com

Which of the following law is followed by ideal gases?
  • Charle's law
  • Boyle's law
  • Avogadro's law
  • All of the above
A spherical balloon of $$21\ cm$$ diameter is to be filled up with $$H_2$$ at $$NTP$$ from a cylinder containing the gas at $$20\ atm$$ at $$27^{\circ}C$$. The cylinder can hold $$2.82$$ litre of water. The number of balloons that can be filled up
  • 11
  • 10
  • 8
  • 1
Total pressure of a gaseous mix is equal to the sum of the Partial Pressures is:
  • Boyle's law
  • Charles's law
  • Avogadro's principle
  • Dalton's law
Which of the following is not an assumption of the kinetic theory of gases? 
  • Collision of gas particles are perfectly elastic.
  • Gas particles have negligible volume.
  • At high pressure, gas particles are difficult to compress.
  • A gas consists of many identical particles which are in continual motion.
Which term describes the mass of $$6.022\times { 10 }^{ 23 }$$ representative particles?
  • Molar mass
  • Avogadro's number
  • Empirical formula
  • Molecular formula
Liquid $$M$$ and liquid $$N$$ form an ideal solution. The vapour pressures of pure liquids $$M$$ and $$N$$ are $$450$$ and $$700\ mm$$ $$Hg$$, respectively, at the same temperature. Then correct statement is:
($${x}_{M}=$$ Mole fraction of $$M$$ in solution;
$${x}_{N}=$$ Mole fraction of $$N$$ in solution;
$${y}_{M}=$$ Mole fraction of $$M$$ in vapour phase;
$${y}_{N}=$$ Mole fraction of $$N$$ in vapour phase)
  • $$({x}_{M}-{y}_{M})< ({x}_{N}-{y}_{N})$$
  • $$\cfrac{{x}_{M}}{{x}_{N}}< \cfrac{{y}_{M}}{{y}_{N}}$$
  • $$\cfrac{{x}_{M}}{{x}_{N}}> \cfrac{{y}_{M}}{{y}_{N}}$$
  • $$\cfrac{{x}_{M}}{{x}_{N}}= \cfrac{{y}_{M}}{{y}_{N}}$$
When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules :
  • Are above the inversion temperature
  • Exert no attractive forces on each other
  • Do work equal to loss in kinetic energy
  • Collide without losing energy
According to kinetic theory of gases :
  • collisions are always elastic
  • heavier molecules transfer more momentum to the wall of the container
  • only a small number of molecules have very high velocity
  • between collisions, the molecules move in straight lines with constant velocities
The correction factor $$'a'$$ to the ideal gas equation corresponds to:
  • electric field present between the gas molecules
  • density of the gas molecules
  • forces of attraction between the gas molecules
  • volume of the gas molecules
Gay Lussac's law of gaseous volume is derived from :
  • law of definite proportions
  • law of multiple proportions
  • law of reciprocal proportions
  • experimental observation
Statement I: Hydrogen gas $$(H_{2})$$ is considered a perfectly ideal gas.

Statement II: Hydrogen atoms interact with each other via hydrogen bonds. 

When statement  is true then T and otherwise F.
  • F, F
  • TT
  • TF
  • FT
At same temperature and pressure, equal volumes of gases contain the same number of:
  • molecules
  • electrons
  • protons
  • particles
The kinetic energy of a molecule of a gas is directly proportional to the absolute temperature of the gas.
  • True
  • False
$$\dfrac{P_{1}V_{1}}{T_{1}} = \dfrac{P_{2}V_{2}}{T_{2}}$$ is true for :
  • Boyle's law
  • Charle's law
  • Ideal gas equation
  • Combined gas law
  • Dalton's law of partial pressures
At constant volume, pressure is directly proportional to the temperature, this law is popularly known as :
  • Charle's law
  • Boyle's law
  • Gay Lussac law
  • Avogadro law
According to the Avogadro's Law, equal volumes of two different gases, under same conditions of temperature and pressure, contain equal number of:
  • atoms
  • molecules
  • electrons
  • protons
Equal volume of gases contain equal number of moles.
State whether the above statement is true or false.
  • The statement is True
  • The statement is False
  • Neither
  • Equal volume of gases contain equal number of moles, only when the temperature is increased
The graph pressure versus temperature $$(T)$$ at constant volume is a straight line.
  • True
  • False
Avogadro's law finds an application in the determination of:
  • Atomicity of gas
  • Molecular weights of gases
  • Molecular formula of certain gaseous compounds
  • All the above
Gay Lussac law gives relation between:
  • $$P\,$$and$$\,V$$
  • $$P\,$$and$$\,T$$
  • $$V\,$$and$$\,T$$
  • none of these
Which of the following statements is the most accurate with regard to the significance of Avogadro's number, $$6.02 \times 10^{23}$$ ?
  • It is the conversion factor between grams and atomic mass units.
  • It is a universal physical constant just as the speed of light.
  • It is the number of particles that is required to fill a $$1\ L$$ container.
  • It is the inverse diameter of an $$H$$ atom .
Which of the following solution in water will have the lowest vapour pressure?
  • $$0.1 M, NaCI$$
  • $$0.1 M, Sucrose$$
  • $$0.1 M,{ BaCI }_{ 2 }$$
  • $$0.1 M { Na }_{ 3 }{ PO }_{ 4 }$$
Which statement is linked with the idea that two identical containers filled with different gases will contain the same number of particles?
  • Mosely
  • Avagadro
  • Dalton
  • Mendeleev
$${ \left( \cfrac { \partial H }{ \partial P }  \right)  }_{ T }$$ for an ideal gas is equal to:
  • zero
  • $$\cfrac { \Delta VRT }{ P } $$
  • $$\cfrac { P\Delta V }{ T } $$
  • $$nR\Delta T$$
Which gas law should be used to solve a gas problem in which only the pressure and temperature of a gas change?
  • Boyle's Law
  • Ideal Gas Law
  • Combined Gas Law
  • Gay-Lussac's Law
All gases have the same number of moles in the same volume at constant temperature and pressure.
  • Boyle's Law
  • Charles's Law
  • Avogadro's Principle
  • Ideal Gas Law
Which of the following would have the lowest vapor pressure in the pure state?
  • Sodium hydroxide because of the strong interparticle forces of ionic solids
  • Methanol because of the hydrogen bonding in the functional group along with the non-polar nature of the carbon hydrogen bonds
  • Water because of the very strong hydrogen bonding in the substances
  • Ammonia because of the unbonded pair of electrons on the central atom coupled with hydrogen bonding in the substance.
Which gas can be collected over water?
  • $$NH_{3}$$
  • $$N_{2}$$
  • $$HCl$$
  • $$SO_{2}$$
Which of the following represents a combination of Boyle's Law and Charle's Law?
  • $$P_{1}V_{1}T_{1}= P_{2}V_{2}T_{2}$$
  • $$\dfrac{P_{1}T_{2}}{V_{2}}=\dfrac{P_{2}T_{1}}{V_{1}}$$
  • $$\dfrac{P_{1}T_{2}}{V_{1}}=\dfrac{P_{2}T_{1}}{V_{2}}$$
  • $$\dfrac{T_{2}V_{1}}{P_{1}}=\dfrac{T_{1}V_{2}}{P_{2}}$$
In a given mixture of non-reacting gases, the ratio of partial pressure of each gas is equal to its:
  • weight percent
  • volume percent
  • mole fraction
  • critical pressure
The value of the universal gas constant $$R$$ depends upon the:
  • nature of the gas
  • mass of the gas
  • temperature of the gas
  • units of measurement
The pressure at which liquid and vapour can coexist at equilibrium is called the :
  • limiting vapour pressure
  • real vapour pressure
  • normal vapour pressure
  • saturated vapour pressure
$$V$$ versus $$T$$ curves at constant pressure $$P_{1}$$ and $$P_{2}$$ for an ideal gas are shown in the figure given above. Choose the correct relation.
18716_21221de1d8b94e7087c34daf5eb8704b.png
  • $$P_{1} > P_{2}$$
  • $$P_{1} < P_{2}$$
  • $$P_{1} = P_{2}$$
  • Cannot be related
Dalton's law of partial pressure is not applicable to which of the following mixture of gases?
  • $$H_{2}+F_{2}$$
  • $$NH_{3}+HCl$$
  • $$SO_{2}+Cl_{2}$$
  • $$H_{2}+O_{2}$$
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Assertion is incorrect but Reason is correct
Which of the following is a correct representation for an ideal gas?
  • $$P_{1}d_{1}T_{1}=P_{2}d_{2}T_{2}$$
  • $$\dfrac{d_{1}P_{1}}{T_{1}}=\dfrac{d_{2}P_{2}}{T_{2}}$$
  • $$\dfrac{P_{1}}{d_{1}T_{1}}=\dfrac{P_{2}}{d_{2}T_{2}}$$
  • $$\dfrac{P_{1}T_{1}}{d_{1}}=\dfrac{P_{2}T_{2}}{d_{2}}$$
For which of the following mixture of gases, Dalton's law of partial pressure is not applicable at room temperature?
  • $$HCl+NH_{3}$$
  • $$CO+CO_{2}$$
  • $$O_{2}+N_{2}$$
  • $$SO_2+O_{2}$$
The total pressure of a mixture of two gases is:
  • the sum of the partial pressure
  • the difference between the partial pressure
  • the product of the partial pressure
  • the ratio of the partial pressure
Which of the following mixture does not obey Dalton's law of partial pressures?
  • $$SO_{2}+Cl_{2}$$
  • $$NH_{3}+PH_{3}$$
  • $$CO_{2}+N_{2}$$
  • $$CO+CO_{2}$$
The value of gas constant in Joules/ K-mole is:
  • 8.314
  • 8.314 x 10$$^{7}$$
  • 1.987
  • 0.0821
Which of the following indicates the value of gas constant?
  • $$1.987 cal \ K-mole$$
  • $$8.3 cal \ deg \ mole$$
  • $$0.0821 lit \ deg \ mole$$
  • $$1.987\ Joules \ deg \ mole$$
When two molecules of an ideal gas collide:
  • heat is liberated
  • no heat is liberated
  • heat is absorbed
  • there is a decrease in the total K.E
According to kinetic theory of gases, there are:
  • intermolecular attractions
  • molecules have considerable volumes
  • no intermolecular attractions
  • velocity of molecules decreases for each collision
Which is wrong according to kinetic theory?
  • The average kinetic energy of the molecules is directly proportional to the absolute temperature.
  • All the molecules in a gas have the same kinetic energy.
  • Collisions between molecules are perfectly elastic.
  • Pressure is due to the impact of the molecules on the walls of the container.
Which of the following values is not correct?
  • $$R = 8.314$$ $$JK$$$$^{-1}$$ $$mol$$$$^{-1}$$
  • $$R = 62.36$$ $$torr$$ $$K$$$$^{-1}$$ $$mol$$ $$^{-1}$$
  • $$R = 0.0821$$ $$lit - atm$$ $$K$$$$^{-1}$$ $$mol$$$$^{-1}$$
  • $$R = 2$$ $$cal$$ $$K$$$$^{-1}$$ $$mol$$$$^{-1}$$
When an ideal gas undergoes expansion through a porous plug, the gas is expected to exhibit no cooling because ___________.
  • there exist no molecular forces of attraction
  • the molecules collide with each other, without any loss of energy
  • the volume occupied by molecules is negligible in comparision to the volume of the gas
  • none of the above
Which is wrong according to kinetic theory of gases?
  • Average $$KE$$ of molecules is proportional to the absolute temperature
  • Collisions between molecules are perfectly elastic
  • Pressure is due to collisions between molecules
  • There are no attractive forces between the molecules of gas
In a 2.5 $$L$$ flask at $$27^{\circ}C$$ temperature, the pressure of a gas was found to be 8 $$atm$$. If $$2.41 \times 10^{23}$$ molecules of the same gas are introduced into the container, the temperature changed to $$T_2$$. The pressure of gas is found to be 10 $$atm$$. Find out the value of $$T_2$$:
  • 253 $$K$$
  • 347 $$K$$
  • 230 $$K$$
  • 370 $$K$$
Kinetic energy of molecules is highest in:
  • gases
  • solids
  • liquids
  • solutions
Which of the following is a representation of Gay-Lussac's law?          
  • $$P_{1}T_{1}=P_{2}T_{2}$$
  • $$P_{1}T_{2}=P_{2}T_{1}$$
  • $$P_{1}V_{1}=P_{2}V_{2}$$
  • $$V_{1}T_{2}=V_{2}T_{1}$$
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