States Of Matter CBSE Questions & Answers

States Of Matter

This is Chemistry Class 11 States of Matter CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The three important states of matter are
  • A
    solid, glasses and gases
  • B
    atoms, molecules and ions
  • C
    solid, liquid and gas
    Correct
  • D
    solid, liquid and plasma
2
Physical behavior of the states differs greatly even though chemical behavior of the three states is identical because
  • A
    chemical properties depend on intermolecular non bonding forces whereas physical properties depend on intermolecular bonding forces
  • B
    chemical properties depend on covalent bonding forces whereas physical properties depend on energy supplied
  • C
    chemical properties depend on intramolecular bonding forces whereas physical properties depend on intermolecular nonbonding forces
    Correct
  • D
    chemical properties depend on non bonding forces whereas physical properties depend on intermolecular bonding forces
3
dipole-dipole forces act between molecules that have
  • A
    an induced electrical dipole moment
  • B
    an electron cloud that causes temporary dipoles
  • C
    a permanent magnetic dipole moment
  • D
    a permanent electrical dipole moment
    Correct
4
Which of the following statements about Hydrogen bond incorrect?
  • A
    In hydrogen bonding H atom becomes partially positive and is attracted to the more negative O atom
  • B
    In hydrogen bonding H atom becomes partially positive and is attracted to the more negative F atom
  • C
    In hydrogen bonding H atom becomes partially negative and is attracted to the more positive N atom
    Correct
  • D
    In hydrogen bonding H atom becomes partially positive and is attracted to the more negative N atom
5
The intermolecular force primarily responsible for the condensed states of nonpolar substances is the
  • A
    dispersion force (or London force)
    Correct
  • B
    hydrogen bond
  • C
    dipole-dipole attraction
  • D
    ion-dipole forces
6
The average Kinetic energy and Thermal energy are proportional to the
  • A
    volume
  • B
    pressure
  • C
    specific heat
  • D
    absolute temperature
    Correct
7
Three states of matter are the result of
  • A
    balance between vanderwaals forces and the London forces
  • B
    balance between intermolecular forces and the intramolecular bonding energy of the molecules
  • C
    balance between intermolecular forces and the thermal energy of the molecules
    Correct
  • D
    balance between Hydrogen bonding forces and the London forces
8
Gases have much lower density than the solids and liquids because
  • A
    thermal energy overcomes the the attractive intermolecular forces
    Correct
  • B
    gases do not have intermolecular forces that attract each molecule to another
  • C
    gases contain lower specific enthalpy than solids
  • D
    distance between the molecules is small compared to solids
9
at constant temperature, the pressure of a fixed amount (i.e., number of moles n) of gas
  • A
    varies directly with its volume
  • B
    varies inversely with its volume
    Correct
  • C
    varies as square of its volume
  • D
    is constant irrespective of volume
10
Charles’ law states that pressure remaining constant, the volume of a fixed mass of a gas is
  • A
    inversely proportional to its absolute temperature
  • B
    constant irrespective of its absolute temperature
  • C
    directly proportional to its absolute temperature
    Correct
  • D
    directly proportional to square of absolute temperature
11
Gay Lussac’s law states that at constant volume, pressure of a fixed amount of a gas
  • A
    varies inversely with the temperature
  • B
    constant irrespective of its absolute temperature
  • C
    directly proportional to square of absolute temperature
  • D
    varies directly with the temperature
    Correct
12
Avogadro law states that
  • A
    equal volumes of all gases under the same conditions of temperature and pressure contain different number of molecules
  • B
    equal volumes of all gases under the similar conditions of temperature and pressure contain equal number of molecules
  • C
    equal volumes of all gases under the same conditions of temperature contain equal number of molecules
  • D
    equal volumes of all gases under the same conditions of temperature and pressure contain equal number of molecules
    Correct
13
Which of the following is the correct ideal gas law
  • A
    pV = 2RT
  • B
    pV = nRT
    Correct
  • C
    pV = 2nR
  • D
    pV = nT
14
Increase in kinetic energy can overcome intermolecular forces of attraction. How will the viscosity of liquid be affected by the increase in temperature?
  • A
    No regular pattern will be followed
  • B
    Decrease
    Correct
  • C
    No effect
  • D
    Increase
15
Dalton’s Law of Partial Pressures states that the total pressure exerted by the mixture of non-reactive gases is equal to the
  • A
    maximum of the partial pressures of individual gases
  • B
    average of the partial pressures of individual gases
  • C
    sum of the partial pressures of individual gases
    Correct
  • D
    difference of the partial pressures of individual gases