Gas Law problems with solution Part - 3

11. What is the mass of 15 liters of chlorine gas at STP?


12. How many liters of ammonia at STP are produced when 10 g of hydrogen is combined with nitrogen?

13. How many milliliters of hydrogen at 0°C and 1400 mmHg are produced if 15g of magnesium reacts with sulfuric acid?

14. What is the mass of 25 liters of fluorine gas at 2.85 atm, 450°C?

15. A nine liter tank has 150 atmospheres of bromine in it at 27°C. What is the added mass of the tank due to the gas?

Answer

11. 47.5 g	12. 74.7 L	13. 7.51 L
14. 45.6 g	15. 8.76 Kg

States of Matter - Fill in Blanks type question in chemistry Part -1

1. The intermixing of gases or liquids in a container irrespective of their densities, is called __________.

2. At constant temperature, if the pressure of a given mass of a gas is decreased, its volume will __________.

3. A volume of __________ dm3 will hold 128 gms of SO2.

4. At constant temperature of a given mass of a gas, the product of its __________ and __________ is constant.

5. The rates of diffusion of gases are __________ proportional to the square root of their densities.

6. Gases deviate from ideal behaviour more markedly at high __________.

7. Liquid diffuse __________ than gases.

8. An imaginary line passing through the centre of a crystal is called __________.

9. The temperature at which more than one crystalline forms of a substance coexist in equilibrium is called __________.

10. Two or more substances crystallizing in the same form is called __________.

11. The existence of solid substances in more than one crystalline form is known as __________.

12. Rate of diffusion of gases is __________ as compared to liquids.

13. Boiling point of a liquid __________ with the pressure.

14. Mercury in a glass tube forms __________ curvature.

15. Gases can be compressed to __________ extent.

16. Viscosity of a liquid __________ with the increase of temperature.

17. Surface tension of water __________ by adding soap solution into it.

18. The internal resistance to the flow of a liquid is called __________.

19. The rise or the fall of a liquid in a capillary tube is called __________.

20. Matter exists in __________ states.

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Chemistry - Ture or False Type Questions in Gaseous, Liquid, Solid State

1. When a liquid and its vapour are in equilibrium and the pressure is suddenly decreased, cooling occurs. (JEE 1984)

True

Reason: The decrease in pressure results in further evaporation of the liquid into gaseous phase. The energy required for this is realized from the liquid itself which causes a decrease in temperature.

2. Kinetic energy of molecules is zero at 0°C. (JEE 1985)

Ans: False

The equation relating energy of molecules to temperature is in absolute temperature and not centigrade temperature.

3. A gas in a closed container will exert much higher pressure due to gravity at the bottom than at the top. (JEE 1985)

False.

It is equal in all directions.

4. Heat capacity of a diatomic gas is higher than that of a monatomic gas. (JEE 1985)
True

Diatomic gas has translational, rotational, and vibrational energies. Monatomic gas has only translational energy.

5. In the van der Waals equation,

[p + n²a/V²][V-nb] = nRT

the constant ‘a’ reflects the actual volume of the gas molecules.

False

Reason: In the equation ‘a’ is a measure of the forces of attraction between gaseous molecules and b is a measure of effective volume occupied the molecules of 1 mol of a gas.

MCQ on Acid base/ van der Waals Equation/ Gaseous - Liquid - Solid States

This are questions from Acids and bases - Past JEE questions,van der Waals Equation - past JEE questions, Gaseous - Liquid - Solid States- Multiple Choice Questions

1. State whether the following statement is true or false
Aluminium chloride (AlCl3) is a Lewis acid because it can donate electrons. (1982)

2. Fill in the blanks

The conjugate base of HSO4ˉ in acqueous solution is ___________. (1982)


3. The conjugate acid of NH2ˉ is:
a. NH3
b. NH2OH
c. NH4⁺
d. N2H4

(1985)

3. In the van der Waals equation of state for a non-ideal gas the term that accounts for intermolecular forces is

a. (V-b)
b. RT
c. (P + a/V²)
d. (RT) ‾ ¹
(1988)

Answer ( c )

A is a measure of the forces of attraction between molecules

4. Indicate whether the following statement is true or false

In the van der Waals equation

[p + n²a/V²] (V – nb) = nRT

the constant ‘a’ reflects the actual volume of the gas molecules.

(1993)

Answer: False

5. The oxidation number of carbon in CH2O is

a. -2
b. +2
c. 0
d. +4
(JEE 1982)

Ans: ( c )

6. Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is

a. same as that of a hydrogen molecule
b. two times that of a hydrogen molecule
c. four times that of a hydrogen molecule
d. half that of a hydrogen molecule
(JEE 1982)

Answer: (a)

7. among the following, the molecule that is linear is

a. CO2
b. NO2
c. SO2
d. ClO2
(JEE 1982)

ans : (a)

CO2 is a linear molecule


8. A liquid is in equilibrium with its vapour at its boiling point. On average, the molecules in the two phases have equal:

a. inter-molecular forces
b. potential energy
c. kinetic energy
d. temperature
(JEE 1984)

Answer (d)

9. Rate of diffusion of a gas is:

a. directly proportional to its density
b. directly proportional t its molecular weight
c. directly proportional to the square root of its molecular weight
d. indirectly proportional to the square root of its molecular weight
(JEE 1985)

Answer (d)

10. the average velocity of an ideal gas molecule at 27°C is 0.3 m/s. the average speed at 927°C will be:

a. 0.6 m/s
b. 0.3 m/s
c. 0.9 m/s
d. 3.0 m/s
(JEE 1986)

Answer: (a)

Chemistry: General Questions on Gas Laws

Find the correct answer by clicking on the choice given. 1. The pressure of a gas will    ?    when the volume is decreased and will    ?    when the absolute temperature is decreased.
	(a)	increase...increase
	(b)	increase...decrease
	(c)	decrease...increase
	(d)	decrease...decrease
2. If the absolute temperature of a gas is doubled and the pressure of the gas is halved, how will the volume change?
	(a)	It will increase by two times its original value.
	(b)	It will decrease to one fourth of its original value.
	(c)	It will stay the same as its original value.
	(d)	It will increase by four times its original value.
3. If both the volume and the pressure of a gas are doubled, how will the absolute temperature change?
	(a)	It will increase by two times its original value.
	(b)	It will decrease to one fourth of its original value.
	(c)	It will stay the same as its original value.
	(d)	It will increase by four times its original value.
4. If 88.0 grams of solid carbon dioxide evaporates, how many liters of CO2 gas will be formed at a temperature of 300 K and 2.00 atmospheres of pressure? The ideal gas law constant "R" is...
	(a)	98.5 liters
	(b)	2170 liters
	(c)	24.6 liters
	(d)	1080 liters
5. The solubility of a gas will _?_ when a solution containing the gas is heated and the solubility of a gas in a solution will _?_ when the pressure over the solution is decreased.
	(a)	decrease...decrease
	(b)	decrease...increase
	(c)	increase...decrease
	(d)	increase...increase
6. What is the total pressure, in atmospheres, of a 10.0 L container that contains 10 moles of nitrogen gas and 10 moles of oxygen gas at 300 K?
	(a)	24.6 L
	(b)	49.3 L
	(c)	2,460 L
	(d)	4,930 L