States of Matter Test

Result

States of Matter Test - 3

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which are three important states of matter ?

A
solid, glasses and gases

B
solid, liquid and plasma

C
atoms, molecules and ions

D
solid, liquid and gas

Solution

Three phases of matter are :

1. Solid - firm and stable in shape; not liquid or fluid, strongest intermolecular forces.
2. Liquid - A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. Intermediate molecular forces.
3. Gas -Takes the volume of the container, weakest intermolecular forces.
Question 2
1 / -0

The intermolecular force primarily responsible for the condensed states of nonpolar substances is the

A
hydrogen bond

B
dipole-dipole attraction

C
ion-dipole forces

D
dispersion force (or London force)

Solution

The intermolecular force primarily responsible for the condensed states of nonpolar substances is the dispersion force (or London force).
Question 3
1 / -0

At constant temperature, the pressure of a fixed amount (i.e., number of moles n) of gas is?

A
Varies as square of its volume.

B
Varies directly with its volume.

C
Varies inversely with its volume.

D
Is constant irrespective of volume.

Solution

From ideal gas equation PV=nRT,
keeping n and T fixed,
P α 1/V. (Boyles Law)
Here,
T = Temperature
P = Pressure
α. = sign of Proportionality
V = Volume
n= number of moles of gas
R= Universal gas constant
Question 4
1 / -0

The mass of 11.2 L of ammonia gas at STP is

A
8.5 g

B
85 g

C
17 g

D
1.7 g
Question 5
1 / -0

Three states of matter are the result of?

A
Balance between intermolecular forces and the intramolecular bonding energy of the molecules

B
Balance between intermolecular forces and the thermal energy of the molecules

C
Balance between vanderwaals forces and the London forces.

D
Balance between Hydrogen bonding forces and the London forces.

Solution

Three states of matter are the result of balance between intermolecular forces and the thermal energy of the molecules. These two factors differentiate them from each other. For understanding, The strongest intermolecular forces are in solid then in liquid and weakest in gases.
Question 6
1 / -0

The following question has four choices out of which ONLY ONE is correct.

An empty 2.0 l vessel is filled with CH₄ (g) at 1.00 atm and O₂ (g) at 4.00 atm, at 300^oC. A spark causes CH₄to burn completely according to the equation:

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g), ∆H = – 802 kJ

Partial pressure of oxygen inside the vessel after combustion is

A
2.00 atm

B
3.33 atm

C
2.04 atm

D
3.40 atm
Question 7
1 / -0

A mixture of N₂ and O₂ in the ratio 4 : 1 by volume is heated in an open mouthed flask from 27^oC to 127^oC. Which of the following statements is/are true?

A
Mole fraction of nitrogen in the final mixture in the flask at 127^oC is 0.8.

B
Fraction of the original mixture that remains in the flask is 1.75.

C
Molar ratio of nitrogen and oxygen becomes 3 : 1.

D
All of the above
Question 8
1 / -0

Gases have much lower density than the solids and liquids because ?

A
Gases contain lower specific enthalpy than solids.

B
Thermal energy overcomes on the attractive intermolecular forces.

C
Distance between the molecules is small compared to solids.

D
Gases do not have intermolecular forces that attract each molecule to another.

Solution

In gases, molecules are far apart from each other, thermal energy which is a measure of freeness of motion is thus very high resulting in a very large volume for the same mass(compared to solid and liquid). Hence there density is lowest.
Question 9
1 / -0

In the ideal gas equation PV = nRT, the value of R depends only on the

A
nature of the gas

B
volume of the gas

C
temperature of the gas

D
units of measurement
Question 10
1 / -0

With increase in pressure, the mean free path

A
increases

B
becomes zero

C
decreases

D
remains constant

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

States of Matter Test - 3

Result

States of Matter Test - 3

Score

-

Rank

-

SHARING IS CARING

Question 1

solid, glasses and gases

solid, liquid and plasma

atoms, molecules and ions

solid, liquid and gas

Solution

Question 2

hydrogen bond

dipole-dipole attraction

ion-dipole forces

dispersion force (or London force)

Solution

Question 3

Varies as square of its volume.

Varies directly with its volume.

Varies inversely with its volume.

Is constant irrespective of volume.

Solution

Question 4

8.5 g

85 g

17 g

1.7 g

Question 5

Balance between intermolecular forces and the intramolecular bonding energy of the molecules

Balance between intermolecular forces and the thermal energy of the molecules

Balance between vanderwaals forces and the London forces.

Balance between Hydrogen bonding forces and the London forces.

Solution

Question 6

2.00 atm

3.33 atm

2.04 atm

3.40 atm

Question 7

Mole fraction of nitrogen in the final mixture in the flask at 127oC is 0.8.

Fraction of the original mixture that remains in the flask is 1.75.

Molar ratio of nitrogen and oxygen becomes 3 : 1.

All of the above

Question 8

Gases contain lower specific enthalpy than solids.

Thermal energy overcomes on the attractive intermolecular forces.

Distance between the molecules is small compared to solids.

Gases do not have intermolecular forces that attract each molecule to another.

Solution

Question 9

nature of the gas

volume of the gas

temperature of the gas

units of measurement

Question 10

increases

becomes zero

decreases

remains constant

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

Mole fraction of nitrogen in the final mixture in the flask at 127^oC is 0.8.