CBSE Questions for Class 11 Medical Chemistry States Of Matter Gases And Liquids Quiz 1 - MCQExams.com

Which of the following gas mixture is not applicable for Dalton's law of particle pressure?
  • $$SO_2$$ and $$Cl_2$$
  • $$CO_2$$ and $$N_2$$
  • $$CO$$ and $$CO_2$$
  • $$CO$$ and $$N_2$$
The value of gas constant per mole is approximately-
  • $$1\ cal$$
  • $$2\ cal$$
  • $$3\ cal$$
  • $$4\ cal$$
A constant gas temperature is based on
  • Archimedes prinviple
  • Pascal laW
  • Boyle's law
  • Charles's law
Gay Lussac law gives relation between:
  • $$P\,$$and$$\,V$$
  • $$P\,$$and$$\,T$$
  • $$V\,$$and$$\,T$$
  • none of these
The three phases of water (Solid, Liquid, Gas) are:
  • ice, water, steam
  • water, ice, steam
  • steam, ice, water
  • steam, water, ice
Identify which of the following statements is FALSE?
  • The vapor pressure of a liquid decreases with increasing atmospheric pressure.
  • The value of an equilibrium constant is dependent on temperature.
  • The rate of a spontaneous reaction cannot be determined solely by its Gibbs free energy.
  • During a phase transition, the temperature of a substance must be constant.
  • The addition of a catalyst to a reaction at equilibrium has no net effect on the system.
$$\Delta_f G^{\circ}$$ at 500 K for substance 'S' in liquid state and gaseous state are +100.7 kcal $$mol^{-1}$$ respectively. Vapour pressure of liquid 'S'' at 500 K is approximately equal to: 

$$R = 2 cal K^{-1} mol^{-1}$$
  • 10 atm
  • 0.1 atm
  • 1 atm
  • 100 atm
All kind of matter is made up of extremely small particles called ___________.
  • atom
  • molecule
  • ion
  • compound
Which term describes the mass of $$6.022\times { 10 }^{ 23 }$$ representative particles?
  • Molar mass
  • Avogadro's number
  • Empirical formula
  • Molecular formula
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 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 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.
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)
  • $$({x}_{M}-{y}_{M})< ({x}_{N}-{y}_{N})$$
  • $$\cfrac{{x}_{M}}{{x}_{N}}< \cfrac{{y}_{M}}{{y}_{N}}$$
  • $$\cfrac{{x}_{M}}{{x}_{N}}> \cfrac{{y}_{M}}{{y}_{N}}$$
  • $$\cfrac{{x}_{M}}{{x}_{N}}= \cfrac{{y}_{M}}{{y}_{N}}$$
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
At same temperature and pressure, equal volumes of gases contain the same number of:
  • molecules
  • electrons
  • protons
  • particles
Matter is made up of ____________.
  • wood
  • blocks
  • particles
  • None of the above
Pen, book, needle belong to which states of matter?
  • Solid
  • Liquid
  • Gas
  • Plasma
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
State True or False.

The standard molar volume of an ideal gas is 22.4 L.
  • True
  • False
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 velocity of sound in a gas is $$30  {ms}^{-1}$$ at $$27^o C$$. What is the velocity of the sound in the same gas at $$127^o C$$?
  • $$20 {ms}^{-1}$$
  • $$30 {ms}^{-1}$$
  • $$20\sqrt{3} {ms}^{-1}$$
  • $$60 {ms}^{-1}$$
Which tool allows liquids to be swirled with a low risk of spilling?
  • Evaporating dish
  • Tonds
  • Crucible
  • Erlenmeyer flask
  • Mortar and pestle
The kinetic energy of a molecule of a gas is directly proportional to the absolute temperature of the gas.
  • True
  • False
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
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
The graph pressure versus temperature $$(T)$$ at constant volume is a straight line.
  • True
  • False
Which of the following is a characteristic of matter?
  • Particles are very small in size.
  • Particles have space among them.
  • Particles posses kinetic energy.
  • All of above.
Most elements are solids at 25$$^o$$C and 1 atm pressure, the exception being the 11 elements that are gases and 2 that are liquids. What 2 elements are liquids?
  • Hg and Br
  • Hg and I
  • Ag and Kr
  • Au and Kr
  • Pt and Co
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?
  • $$0.1 M, NaCI$$
  • $$0.1 M, Sucrose$$
  • $$0.1 M,{ BaCI }_{ 2 }$$
  • $$0.1 M { Na }_{ 3 }{ PO }_{ 4 }$$
$${ \left( \cfrac { \partial H }{ \partial P }  \right)  }_{ T }$$ for an ideal gas is equal to:
  • zero
  • $$\cfrac { \Delta VRT }{ P } $$
  • $$\cfrac { P\Delta V }{ T } $$
  • $$nR\Delta T$$
Which 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.
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
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
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
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
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
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
The velocity of a gas molecule present in a cubic vessel in $$x-$$direction is 1000 $$cm/sec$$. The side of that cubic vessel is 10 $$cm$$. The number of bombardments made by the molecule on one face in $$x-$$direction in one second is:
  • $$200$$
  • $$400$$
  • $$25$$
  • $$50$$
Which of the following is not a surface phenomenon?
  • Surface tension
  • Viscosity
  • Evaporation
  • Capillarity
$$V$$ 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
Value of gas constant $$R$$ is:
  • $$0.082$$ $$L\:atm$$
  • $$0.987$$ $$cal\:mol$$$$^{-1}$$$$K$$$$^{-1}$$
  • $$8.3$$ $$J \:mol$$$$^{-1}$$$$K$$$$^{-1}$$
  • $$83$$ $$erg \:mol$$$$^{-1}$$$$K$$$$^{-1}$$
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