گیسیں اور مائعات

At constant pressure, the absolute temperature of a gas is doubled. Its volume:

• 1 Halves
• 2 Doubles
• 3 Stays the same
• 4 Becomes four times as large

4 L of a gas at 1 atm is compressed to 2 L at constant temperature. What is the new pressure?

• 1 0.5 atm
• 2 2 atm
• 3 4 atm
• 4 8 atm

According to Avogadro's law, equal volumes of gases at the same temperature and pressure contain:

• 1 Equal masses
• 2 Equal numbers of molecules
• 3 Equal densities
• 4 Equal numbers of atoms

Compared with oxygen, hydrogen gas effuses how many times faster under the same conditions? (H = 1, O = 16)

• 1 2 times
• 2 4 times
• 3 8 times
• 4 16 times

How many moles of gas occupy 22.4 dm3 at STP?

• 1 0.5
• 2 1
• 3 2
• 4 22.4

As the temperature of a liquid rises, its vapour pressure:

• 1 Decreases
• 2 Increases
• 3 Stays the same
• 4 Becomes zero

A mixture holds gas A at a partial pressure of 0.5 atm and gas B at 1.5 atm. What is the total pressure?

• 1 1.0 atm
• 2 0.75 atm
• 3 2.0 atm
• 4 3.0 atm

Real gases deviate most from ideal behaviour at:

• 1 High temperature and low pressure
• 2 Low temperature and high pressure
• 3 High temperature and high pressure
• 4 Low temperature and low pressure