States of Matter Test

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States of Matter Test - 1

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Weekly Quiz Competition

Question 1
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Physical behavior of the states differs greatly even though chemical behavior of the three states is identical because chemical properties depends upon ?

A
covalent bonding forces whereas physical properties depend on energy supplied.

B
non bonding forces whereas physical properties depend on intermolecular bonding forces.

C
intramolecular bonding forces whereas physical properties depend on intermolecular Non-bonding forces.

D
intermolecular non bonding forces whereas physical properties depend on intermolecular bonding forces.

Solution

The question is based on the understanding of how the forces operate in a molecule. It is known that chemical properties depend on intramolecular bonding forces (holding the atoms in a molecule together), whereas physical properties depend on intermolecular non-bonding force (such as different kinds of polar interactions holding the molecules together).
Question 2
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The average Kinetic energy and Thermal energy are proportional to the

A
Volume

B
Absolute Temperature

C
Specific Heat

D
Pressure

Solution

The average KE and Thermal energy are proportional to absolute Temperature.
The kinetic energy is the amount of motion in the atoms and molecules of a substance. The moleculess of the gas gain energy as the temperature increases as there is more motion of the molecules. As the temperature decreases the motion lessens until at absolute zero all motion (kinetic energy) stops.
Question 3
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Gay Lussac’s law states that at constant volume, pressure of a fixed amount of a gas ?

A
Varies inversely with the temperature.

B
Directly proportional to square of absolute temperature.

C
Varies directly with the temperature

D
Constant irrespective of its absolute temperature.

Solution

The question is based on statement of Gay Lussac’s law-“ At constant temperature, the pressure of a given mass of a gas is directly proportional to its absolute temperature.”
mathematically;
PαT (at constant temperature)
or P/T = constant
Question 4
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Separation of a mixture of gases on the basis of the difference in their rates of diffusion is called

A
hydrolysis

B
atmolysis

C
electrolysis

D
osmosis
Question 5
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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 N atom.

C
In hydrogen bonding H atom becomes partially negative and is attracted to the more positive N atom.

D
In hydrogen bonding H atom becomes partially positive and is attracted to the more negative F atom.

Solution

Hydrogen atom covalently bonded to highly electronegative atom such as N,O experience electrostatic field of another highly electronegative atom due to which a partial positive charge is developed on H atom.
Question 6
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When a compressed real gas is allowed to expand through a porous plug at a temperature above its inversion temperature, there is

A
a fall in temperature of the gas

B
a rise in temperature of the gas

C
neither rise nor fall in temperature of the gas

D
a fall in temperature of the gas followed by rise in temperature of the gas
Question 7
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dipole-dipole forces act between molecules that have

A
a permanent magnetic dipole moment

B
a permanent electrical dipole moment.

C
an electron cloud that causes temporary dipoles

D
an induced electrical dipole moment

Solution

dipole dipole forces act between molecules that have a permanent electrical dipole moment,the partial charge of one molecule get attracted to the opposite charge of other molecule
Question 8
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Which of the following options represents Avogadro's number?

A
The number of molecules present in 1 L of gas at NTP

B
The number of molecules present in 22.4 mL of gas at NTP

C
The number of molecules present in 22.4 L of gas at 298 K and 1 atm pressure

D
The number of molecules present in one mole of gas at any temperature and pressure
Question 9
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Which gas is most soluble in water?

A
H₂S

B
NH₃

C
SO₂

D
CO₂
Question 10
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Which of the following liquids will exhibit the highest vapour pressure?

A
C₂H₅OH(l)

B
NH₃(l)

C
HF(l)

D
H₂O(l)

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States of Matter Test - 1

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States of Matter Test - 1

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Question 1

covalent bonding forces whereas physical properties depend on energy supplied.

non bonding forces whereas physical properties depend on intermolecular bonding forces.

intramolecular bonding forces whereas physical properties depend on intermolecular Non-bonding forces.

intermolecular non bonding forces whereas physical properties depend on intermolecular bonding forces.

Solution

Question 2

Volume

Absolute Temperature

Specific Heat

Pressure

Solution

Question 3

Varies inversely with the temperature.

Directly proportional to square of absolute temperature.

Varies directly with the temperature

Constant irrespective of its absolute temperature.

Solution

Question 4

hydrolysis

atmolysis

electrolysis

osmosis

Question 5

In hydrogen bonding H atom becomes partially positive and is attracted to the more negative O atom.

In hydrogen bonding H atom becomes partially positive and is attracted to the more negative N atom.

In hydrogen bonding H atom becomes partially negative and is attracted to the more positive N atom.

In hydrogen bonding H atom becomes partially positive and is attracted to the more negative F atom.

Solution

Question 6

a fall in temperature of the gas

a rise in temperature of the gas

neither rise nor fall in temperature of the gas

a fall in temperature of the gas followed by rise in temperature of the gas

Question 7

a permanent magnetic dipole moment

a permanent electrical dipole moment.

an electron cloud that causes temporary dipoles

an induced electrical dipole moment

Solution

Question 8

The number of molecules present in 1 L of gas at NTP

The number of molecules present in 22.4 mL of gas at NTP

The number of molecules present in 22.4 L of gas at 298 K and 1 atm pressure

The number of molecules present in one mole of gas at any temperature and pressure

Question 9

H2S

NH3

SO2

CO2

Question 10

C2H5OH(l)

NH3(l)

HF(l)

H2O(l)

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H₂S

NH₃

SO₂

CO₂

C₂H₅OH(l)

NH₃(l)

H₂O(l)