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Free Practice Quiz Question List

6 Gases and the Gas Laws Online Quiz Questions

Use this free practice quiz with 20 questions to review 6 Gases and the Gas Laws, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Temperatures used in Charles’s law must be expressed in kelvins.

  1. A

    True

  2. B

    False

02
Fill in the blank
1 point

Complete the pressure conversion: 1 atm=1\,\text{atm}= .

03
True or false
1 point

True or false: Gas pressure on a container wall results from gas particles colliding with that wall.

  1. A

    True

  2. B

    False

04
Choose one
1 point

A gas sample is compressed to half its original volume while its temperature and amount remain constant. How does its pressure change?

  1. A

    The pressure is halved.

  2. B

    The pressure doubles.

  3. C

    The pressure stays the same.

  4. D

    The pressure becomes four times as large.

05
Choose one
1 point

Which gas law predicts how a gas’s volume changes with temperature when pressure and amount of gas are held constant?

  1. A

    Boyle’s law

  2. B

    Avogadro’s law

  3. C

    Charles’s law

  4. D

    Dalton’s law of partial pressures

06
Written response
1 point

What law states that a gas’s pressure is proportional to its absolute temperature when volume and amount are constant?

07
Fill in the blank
1 point

For a gas collected over water, the dry gas pressure equals the total pressure minus .

08
Choose all
1 point

Select all statements that correctly describe gas-law relationships.

  1. A

    At constant temperature and amount, decreasing volume increases pressure.

  2. B

    At constant pressure and amount, decreasing temperature increases volume.

  3. C

    At constant pressure and amount, increasing absolute temperature increases volume.

  4. D

    At constant volume and amount, increasing absolute temperature decreases pressure.

09
Written response
1 point

A gas occupies 2.0 L2.0\,\text{L} at 300 K300\,\text{K}. At constant pressure and amount, what volume will it occupy at 450 K450\,\text{K}? Enter the volume in litres.

10
Choose one
1 point

A nonreacting gas mixture contains two gases with partial pressures of 0.40 atm0.40\,\text{atm} and 0.60 atm0.60\,\text{atm}. What is the total pressure?

  1. A

    0.20 atm0.20\,\text{atm}

  2. B

    1.00 atm1.00\,\text{atm}

  3. C

    1.50 atm1.50\,\text{atm}

  4. D

    2.40 atm2.40\,\text{atm}

11
Choose all
1 point

A nonreacting mixture has a total pressure of 4.0 atm4.0\,\text{atm}. Gas A has mole fraction 0.250.25, and gas B has mole fraction 0.750.75. Select all correct statements about their partial pressures.

  1. A

    Gas A has a partial pressure of 1.0 atm1.0\,\text{atm}.

  2. B

    Gas B has a partial pressure of 3.0 atm3.0\,\text{atm}.

  3. C

    Gas A has a partial pressure of 0.25 atm0.25\,\text{atm}.

  4. D

    The two partial pressures sum to 4.0 atm4.0\,\text{atm}.

12
Written response
1 point

Convert 1.00 atm1.00\,\text{atm} to kilopascals using 1 atm=101.325 kPa1\,\text{atm}=101.325\,\text{kPa}. Enter the pressure in kilopascals.

13
Open ended
1 point

Calculate the volume of 0.250 mol0.250\,\text{mol} of an ideal gas at 300 K300\,\text{K} and 2.00 atm2.00\,\text{atm}. Show which value of RR you use and your calculation.

14
Choose one
1 point

A calculation uses pressure in kilopascals, volume in litres, amount in moles, and temperature in kelvins. Which ideal gas constant has matching units?

  1. A

    0.08206 L⋅atm⋅mol−1⋅K−10.08206\,\text{L·atm·mol}^{-1}\text{·K}^{-1}

  2. B

    8.314 Pa⋅L⋅mol−1⋅K−18.314\,\text{Pa·L·mol}^{-1}\text{·K}^{-1}

  3. C

    8.314 kPa⋅L⋅mol−1⋅K−18.314\,\text{kPa·L·mol}^{-1}\text{·K}^{-1}

  4. D

    0.08206 kPa⋅L⋅mol−1⋅K−10.08206\,\text{kPa·L·mol}^{-1}\text{·K}^{-1}

15
Choose one
1 point

A fixed amount of gas occupies 4.0 L4.0\,\text{L} at 1.5 atm1.5\,\text{atm} and 300 K300\,\text{K}. It changes to 1.0 atm1.0\,\text{atm} and 400 K400\,\text{K}. What is its final volume?

  1. A

    4.0 L4.0\,\text{L}

  2. B

    6.0 L6.0\,\text{L}

  3. C

    8.0 L8.0\,\text{L}

  4. D

    12.0 L12.0\,\text{L}

16
Choose one
1 point

Under which conditions is the ideal-gas equation generally the most useful approximation for a real gas?

  1. A

    Relatively high pressure and low temperature

  2. B

    Relatively low pressure and high temperature

  3. C

    Relatively high pressure and high temperature

  4. D

    Relatively low pressure and low temperature

17
Choose one
1 point

Gas escapes from a container as its pressure, volume, and temperature change. Why is the combined gas law alone not sufficient to relate the initial and final states?

  1. A

    The amount of gas changes, but the combined gas law assumes it stays fixed.

  2. B

    The combined gas law can only be used when pressure stays constant.

  3. C

    The combined gas law requires the gas to have a mole fraction of one.

  4. D

    The combined gas law cannot be used when volume changes.

18
Choose one
1 point

A fixed amount of gas changes pressure, volume, and temperature between two states. Which equation directly relates the initial and final states?

  1. A

    P1V1=P2V2P_1V_1=P_2V_2

  2. B

    V1T1=V2T2\frac{V_1}{T_1}=\frac{V_2}{T_2}

  3. C

    P1V1T1=P2V2T2\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

  4. D

    PV=nRTPV=nRT

19
True or false
1 point

The ideal-gas equation is a useful approximation for many gases, but it is not necessarily exact under all conditions.

  1. A

    True

  2. B

    False

20
Written response
1 point

A gas occupies 3.0 L3.0\,\text{L} when its amount is 0.50 mol0.50\,\text{mol}. At the same pressure and temperature, the amount increases to 0.80 mol0.80\,\text{mol}. What volume does the gas occupy?