CBSE Questions for Class 11 Medical Chemistry States Of Matter Gases And Liquids Quiz 3 - MCQExams.com

Petrol and kerosene are liquids while nitrogen and oxygen are gases.
  • True
  • False
The value of gas constant $$R$$ is $$8.314\space X$$. Here $$X$$ is represent :
  • $$L \space atm\space K^{-1}\space mol^{-1}$$
  • $$cal\space mol^{-1}\space K^{-1}$$
  • $$J\space K^{-1}\space mol^{-1}$$
  • None of the above
Collision frequency $$(Z)$$ of a gas at a particular pressure: 
  • Decreases with the rise in temperature
  • Increases with the rise in temperature
  • Decreases initially and thereafter increases
  • Unpredictable
In a gas equation $$PV = nRT$$, the value of universal gas constant depends upon:
  • the nature of the gas
  • the pressure of the gas
  • the temperature of the gas
  • the units of measurement
The total pressure of a mixture of two gases is equal to : 
  • Sum of their partial pressures
  • The difference in partial pressures
  • The product of partial pressures
  • The ratio of partial pressures
Law of definite proportions when expressed in terms of volumes becomes:
  • Dalton's Law
  • Berzelius hypothesis
  • Gay-Lussac's Law
  • Avogadro's Law
Water boils when:
  • saturated vapour pressure of water becomes equal to the atmospheric pressure
  • boiling point of water becomes more than atmospheric pressure
  • saturated vapour pressure of water is less than atmospheric pressure
  • vapour pressure of water becomes more than atmospheric pressure
If $$1$$ L of $$O_2$$ at $$15^oC$$ and $$750$$ mm pressure contains $$\text N$$ molecules, the number of molecules in $$2$$ L of $$SO_2$$ under the same conditions of temperature and pressure will be :
  • $$\dfrac {\text N}{2}$$
  • $$\text N$$
  • $$2\text N$$
  • $$4\text N$$
The best evidence for the existence and movement of particles in liquids was provided by ______________.
  • John Dalton
  • Thomas Edison
  • J.J. Thomson
  • Robert Brown
At standard temperature and pressure, the volume of 7.1 kg of $$Cl_2$$ will be:
  • 2240 L
  • 2.24 L
  • 224 L
  • 4.48 L
According to the kinetic theory of gases there are:
  • Intermolecular attractions
  • Molecules which have considerable volume
  • No intermolecular forces of attraction
  • The velocity of molecules decreases for each collision
In a thermally isolated system. Two boxes filled with an ideal gas are connected by a valve. When the valve is in closed position, states of the box 1 and 2, respectively,are (1 atm, $$V_i T$$) and (0.5 atm, 4V, T). When the valve is opened, the final pressure of the system is approximately.
  • 0.5 atm
  • 0.6 atm
  • 0.75 atm
  • 1.0 atm
Which one of the following is a correct statement?
Ice provides more cooling effect than water at $$273\ K$$.
2. Evaporation of a liquid causes cooling.
3. Increase of pressure lowers the separation between the particles of matter.
  • $$1$$ and $$2$$
  • $$1$$ and $$3$$
  • $$2$$ and $$3$$
  • $$1, 2$$ and $$3$$
At same temperature and pressure equal volumes of two or more gases have the equal numbers of atoms. Above hypothesis was given by
  • Avogadro
  • Dalton
  • Gay-lussac
  • None of these
Assertion: Gases do not settle to the bottom of a container.
Reason: Gases have high kinetic energy.

Choose the appropriate option from the following :
  • If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • If both assertion and reason are true, but the reason is not the correct explanation of the assertion.
  • If the assertion is true, but reason is false.
  • If both the assertion and reason are false.
The boiling point of a liquid with the increase of pressure,  ______________.
  • decreases
  • increases
  • remains constant
  • changes according to the weather
Assertion: Wet air is heavier than dry air.
Reason: The density of dry air is more than density of water.
  • If both assertion and reason are true and the reason is a correct explanation of the assertion.
  • If both assertion and reason are true, but reason is not a correct explanation of the assertion.
  • If the assertion is true, but reason is false.
  • If both the assertion and reason are false.
  • If the assertion is false, but the reason is true.
What is the shape of the meniscus observed when water and mercury are taken in two different capillary tubes?
  • Concave and convex
  • Convex and concave
  • Both concave
  • Both conves
At Darjeeling, distilled water boils at a temperature _____________.
  • above $$373$$ K
  • above $$473$$ K
  • below $$373$$ K
  • at $$373$$ K
For which of the following reactions, is Gay Lussac's law not applicable?
  • Formation of $$HI$$ from its constituents
  • Formation of $$NH_3$$ from its constituents
  • Formation of $$CO_2$$ from its constituents
  • Formation of $$SO_3$$ from $$SO_2$$ and $$O_2$$
The number of molecules in 1 L of oxygen and 1 L of nitrogen at STP will be:
  • equal
  • greater for $$N_2$$
  • greater for $$O_2$$
  • equal to Avogadro's number
Why does temperature remain constant as a liquid is heated and gets converted to its gaseous state at its boiling point? 
  • Due to increase in potential energy
  • Due to increase in kinetic energy 
  • Due to decrease in potential energy
  • Due to decrease in kinetic energy
Considering a given mass of a gas by keeping the third variable constant, identify the wrong statements regarding an ideal gas.
(A) With increase in pressure, volume decreases.
(B) With increase in temperature, pressure decreases.
(C) With increase in temperature, volume increases.
  • (A) & (B)
  • (B) & (C)
  • (A) only
  • (B) only
Which one of the following is not a category of states of matter?
  • Solid
  • Liquid
  • Gas
  • Semi-liquid
The existence of the states of matter is due to ___________.
  • necessity of defining the three states
  • variation in the characteristics particles of matter
  • All of the above
  • None of the above
Which of the following are the properties of solid?
  • They have a definite shape
  • They have distinct boundaries
  • They have fixed volume
  • All of the above
Why rubber band is considered as a solid?
  • It takes the shape of the container
  • It has fixed volume
  • It has negligible compressibility
  • It changes shape under force and regains the shape when the force is removed
The decreasing order of compressibility of states of matter is:
  • gas > solid > liquid
  • solid > liquid > gas
  • gas > liquid > solid
  • liquid > gas > solid
Solids, liquids and gases can diffuse into __________.
  • solids
  • liquids
  • gases
  • plasma
Assertion: All molecules in a gas have same speed.
Reason: Gas contains molecules of different size and shape.

Choose the appropriate option.
  • If both assertion and reason are true and the reason is a correct explanation of the assertion.
  • If both assertion and reason are true, but reason is not a correct explanation of the assertion.
  • If the assertion is true, but reason is false.
  • If both the assertion and reason are false.
Water, milk, fruit juice, cold drinks are examples of which states of matter?
  • Solid
  • Liquid
  • Gas
  • Plasma
Which of the following is solid?
  • Rubber band
  • Sugar
  • Sponge
  • All of the above
Which of the following order is true about the force of attraction between particles of states of matter?
  • Gas > Solid > Liquid
  • Solid > Liquid > Gas
  • Gas > Liquid > Solid
  • Liquid > Gas > Solid
Molecules are held together by which type of bonds?
  • Covalent bonds
  • Ionic bonds
  • Both A and B
  • None of above
The $$CO_{2}$$ gas does not follow gaseous laws at all ranges of pressure and temperature because :
  • It is triatomic gas
  • Its internal energy is quite high
  • There is attraction between its molecules
  • It solidity at low temperature
Which of the following states of matter are called fluids?
  • Solid, Gas
  • Solid, Liquid
  • Liquid, Gas
  • Solid, Liquid, Gas
The decreasing order of diffusion is ___________.
  • Gas > Solid > liquid
  • Liquid > Gas > Solid
  • Solid > Liquid > Gas
  • Gas > Liquid > Solid
Particles move randomly in _____________.
  • nitrogen
  • sugar
  • ice
  • water
A closed vessel is maintained at a constant temperature. It is first evacuated and then vapour is injected into it continuously. The pressure of the vapour in the vessel is:
  • increases continuously
  • first increases and then remains constant
  • first increases and then decreases
  • none of the above
The decreasing order of the intermolecular spaces between particles of states of matter is _________.
  • Gas > Liquid > Solid
  • Liquid > Solid > Liquid
  • Liquid > Solid > Gas
  • Solid > Liquid > Gas
The gas which is used for cooking at our home is _____________.
  • Oxygen
  • Nitrogen
  • L.P.G ( liquefied petroleum gas ) 
  • C.N.G ( compressed natural gas )
Which is not true about the Kinetic Molecular Theory?
  • Gas molecules have forces of attraction for each other
  • Gas molecules move in a random, straight-line motion
  • Gas molecules have a negligible volume compared to the volume they occupy
  • Collisions between gas molecules lead to a transfer of energy that is conserved
  • All of the above statements are correct
Statement 1: According to the Kinetic Moecular Theory, the particles of a gas are in random motion at absolute zero temperature.
Statement 2: The degree of random motion of gas molecules varies inversely with the temperature of the gas.

  • Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1

  • Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1

  • Statement 1 is correct but Statement 2 is not correct

  • Statement 1 is not correct but Statement 2 is correct

  • Both the Statement 1 and Statement 2 are not correct

Which one proposes the basic postulates concerning elements and atoms?
  • Avogadro's number
  • $$P_1V_1=P_2V_2$$
  • $$V_1T_2=V_2T_1$$
  • Dalton's theory
  • Gay-Lussac's Law
The molar volume of $$CO_2$$ is maximum at: 
  • $$NTP$$
  • $$0^o\ C$$ and $$2.0\ atm$$
  • $$127^o\ C$$ and $$1\ atm$$
  • $$273^o\ C$$ and $$2\ atm$$
A sample of neon gas is contained by a closed 4-litre vessel. The temperature of container is 25 $$^oC$$ and pressure is 1.5  atmospheres. (The gas constant, $$R$$, is equal to 0.08 $$Latm/ \:mol/ \: K$$).
Neon gas in the vessel is replaced with an equal molar quantity of helium gas. Which of the following properties of the gas in the container will be changed?
I. Pressure
II. Temperature
III. Density
  • I only
  • II only
  • III only
  • I and II only
  • II and III only
Find the new volume of the gas, when kelvin temperature and pressure of a fixed amount of gas is doubled?
  • Twice its original volume
  • Unchanged
  • One-half its original volume
  • One-fourth its original volum
  • Four times greater than its original volume
According to the Kinetic-Molecular Theory, the kinetic energy of the molecules increases when they are --------------
  • mixed with other molecules at lower temperature
  •  frozen into a solid
  •  condensed into a liquid
  •  heated to a higher temperature
  • Collide with each other in a container at a lower temperature
Which one is correct about  Gay-Lussac's law?
  • V/T $$=$$ k
  • P/T $$=$$ k
  • PV $$=$$ k
  • $$P_T=P_1+P_2+P_3$$
  • PT $$=$$ k
Which one proposes a relationship between the combining volumes of gases with respect to the reactants and gaseous products.
  • Avogadro's number
  • $$P_1V_1=P_2V_2$$
  • $$V_1T_2=V_2T_1$$
  • Dalton's Theory
  • Gay-Lussac's Law
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