# 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
• 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
• 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
• 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
 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
• 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
• 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.
• $$P_{1} > P_{2}$$
• $$P_{1} < P_{2}$$
• $$P_{1} = P_{2}$$
• 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?
• $$P_{1}T_{1}=P_{2}T_{2}$$
• $$P_{1}T_{2}=P_{2}T_{1}$$
• $$P_{1}V_{1}=P_{2}V_{2}$$
• $$V_{1}T_{2}=V_{2}T_{1}$$