States of Matter Test

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States of Matter Test - 10

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Weekly Quiz Competition

Question 1
1 / -0

Equal volume of gases contain equal number of moles.
State whether the above statement is true or false.

A
The statement is True

B
The statement is False

C
Neither

D
Equal volume of gases contain equal number of moles, only when the temperature is increased

Solution

Avogadro's Law states that at the same temperature and pressure, equal volumes of different gases contain an equal number of particles.
Question 2
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Which of the following statements is the most accurate with regard to the significance of Avogadro's number, $$6.02 \times 10^{23}$$ ?

A
It is the conversion factor between grams and atomic mass units.

B
It is a universal physical constant just as the speed of light.

C
It is the number of particles that is required to fill a $$1\ L$$ container.

D
It is the inverse diameter of an $$H$$ atom .

Solution

A carbon atom weighs 12 AMU, one AMU is equivalent to $$1.66 \times 10^{-24}$$ grams. Conversely, one gram is equivalent to $$6.022 \times 10^{23}$$ AMU, which is called Avogadro's number

so the answer is A
Question 3
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Which term describes the mass of $$6.022\times { 10 }^{ 23 }$$ representative particles?

A
Molar mass

B
Avogadro's number

C
Empirical formula

D
Molecular formula

Solution

Molar mass of a compound describes the total mass of $$6.023 \times 10^{23}$$ atoms or particles of the compound.
Ex: Molar mass of $$H_2 = 2\space g$$
Question 4
1 / -0

Which of the following solution in water will have the lowest vapour pressure?

A
$$0.1 M, NaCI$$

B
$$0.1 M, Sucrose$$

C
$$0.1 M,{ BaCI }_{ 2 }$$

D
$$0.1 M { Na }_{ 3 }{ PO }_{ 4 }$$

Solution

$$Na_3PO_4$$ will give maximum ions in water ($$4$$ ions)
So, it has lowest vapour pressure.
Question 5
1 / -0

Which statement is linked with the idea that two identical containers filled with different gases will contain the same number of particles?

A
Mosely

B
Avagadro

C
Dalton

D
Mendeleev

Solution

Avagadro stated that when two identical containers are filled with different gases at same pressure and temperature, they contain same number of particles.
So, the statement is linked with Avagadro.
Question 6
1 / -0

$${ \left( \cfrac { \partial H }{ \partial P } \right) }_{ T }$$ for an ideal gas is equal to:

A
zero

B
$$\cfrac { \Delta VRT }{ P } $$

C
$$\cfrac { P\Delta V }{ T } $$

D
$$nR\Delta T$$

Solution

Internal energy is due to motion of particles in a system. As internal energy depends on temperature. As we know temperature in isothermal process is constant so the internal energy will also be constant thus the change in internal energy will be zero.
Question 7
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Which gas law should be used to solve a gas problem in which only the pressure and temperature of a gas change?

A
Boyle's Law

B
Ideal Gas Law

C
Combined Gas Law

D
Gay-Lussac's Law

Solution

Gay-Lussac's law states that for a given mass and constant volume of an ideal gas, the pressure exerted on the sides of container is directly propotional to absolute temperature.
So, for pressure-temperature graph, we use Gay-Lussac's law.
Question 8
1 / -0

All gases have the same number of moles in the same volume at constant temperature and pressure.

A
Boyle's Law

B
Charles's Law

C
Avogadro's Principle

D
Ideal Gas Law

Solution

According to the Avogadro's principal, every gas have the same number of moles in the same volume at constant temperature and pressure.
Question 9
1 / -0

Which of the following would have the lowest vapor pressure in the pure state?

A
Sodium hydroxide because of the strong interparticle forces of ionic solids

B
Methanol because of the hydrogen bonding in the functional group along with the non-polar nature of the carbon hydrogen bonds

C
Water because of the very strong hydrogen bonding in the substances

D
Ammonia because of the unbonded pair of electrons on the central atom coupled with hydrogen bonding in the substance.

Solution

Sodium hydroxide have lowest vapour pressure in the pure state because of the strong interparticle forces of ionic solids and also non-volatile in nature.
Question 10
1 / -0

Which gas can be collected over water?

A
$$NH_{3}$$

B
$$N_{2}$$

C
$$HCl$$

D
$$SO_{2}$$

Solution

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States of Matter Test - 10

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States of Matter Test - 10

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Question 1

The statement is True

The statement is False

Neither

Equal volume of gases contain equal number of moles, only when the temperature is increased

Solution

Question 2

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 .

Solution

Question 3

Molar mass

Avogadro's number

Empirical formula

Molecular formula

Solution

Question 4

$$0.1 M, NaCI$$

$$0.1 M, Sucrose$$

$$0.1 M,{ BaCI }_{ 2 }$$

$$0.1 M { Na }_{ 3 }{ PO }_{ 4 }$$

Solution

Question 5

Mosely

Avagadro

Dalton

Mendeleev

Solution

Question 6

zero

$$\cfrac { \Delta VRT }{ P } $$

$$\cfrac { P\Delta V }{ T } $$

$$nR\Delta T$$

Solution

Question 7

Boyle's Law

Ideal Gas Law

Combined Gas Law

Gay-Lussac's Law

Solution

Question 8

Boyle's Law

Charles's Law

Avogadro's Principle

Ideal Gas Law

Solution

Question 9

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.

Solution

Question 10

$$NH_{3}$$

$$N_{2}$$

$$HCl$$

$$SO_{2}$$

Solution

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