- If the volume of a gas decreases while the number of moles and temperature remain constant, what happens to the pressure?
A) It decreases.
B) It remains the same.
C) It increases.
D) It becomes zero.
Answer: C) It increases.
Explanation: According to Boyle’s Law, if the volume decreases while the number of moles and temperature remain constant, the pressure increases
- A sample of gas has a volume of 15 L at a temperature of 300 K. If the temperature is increased to 600 K at constant pressure, what will the new volume be?
A) 7.5 L
B) 15 L
C) 30 L
D) 45 L
Answer: C) 30 L
Explanation: Using Charles’s Law, if the temperature doubles (from 300 K to 600 K), the volume will also double, resulting in a new volume of 30 L.
- If a gas occupies a volume of 25 L at a pressure of 1.5 atm, what will be the volume when the pressure is reduced to 0.75 atm at constant temperature?
A) 12.5 L
B) 25 L
C) 50 L
D) 75 L
Answer: C) 50 L
Explanation: According to Boyle’s Law, if the pressure is halved (from 1.5 atm to 0.75 atm), the volume will double (from 25 L to 50 L).
- In which condition do real gases deviate most from ideal gas behavior?
A) Low temperature and high pressure.
B) High temperature and low pressure.
C) Low pressure and high temperature.
D) Moderate temperature and moderate pressure.
Answer: A) Low temperature and high pressure.
Explanation: Real gases deviate from ideal gas behavior under low temperature and high pressure conditions, where intermolecular forces and particle volumes become significant.
- Which gas law describes the behavior of a gas when the amount of gas is increased while keeping pressure and temperature constant?
A) Boyle’s Law
B) Charles’s Law
C) Avogadro’s Law
D) Ideal Gas Law
Answer: C) Avogadro’s Law
Explanation: Avogadro’s Law states that the volume of a gas is directly proportional to the number of moles of gas when temperature and pressure are held constant.
- What is the effect of increasing the temperature of a gas in a flexible container, like a balloon?
A) The volume decreases.
B) The volume remains constant.
C) The volume increases.
D) The pressure remains constant.
Answer: C) The volume increases.
Explanation: According to Charles’s Law, increasing the temperature of a gas at constant pressure causes its volume to increase, as the gas particles move more rapidly and expand.
- What is the term used to describe the pressure exerted by a specific gas in a mixture?
A) Total pressure
B) Absolute pressure
C) Partial pressure
D) Atmospheric pressure
Answer: C) Partial pressure
Explanation: Partial pressure is the pressure exerted by a single gas in a mixture of gases and is part of the total pressure of the system.
- A gas occupies 1.0 L at 1 atm. If the volume is reduced to 0.5 L at constant temperature, what is the new pressure?
A) 0.5 atm
B) 1 atm
C) 2 atm
D) 4 atm
Answer: C) 2 atm
Explanation: According to Boyle’s Law, reducing the volume by half will double the pressure from 1 atm to 2 atm.
- When temperature is constant and volume increases, what happens to the pressure of a gas?
A) It increases.
B) It decreases.
C) It remains constant.
D) It becomes zero.
Answer: B) It decreases.
Explanation: According to Boyle’s Law, if the volume of a gas increases at constant temperature, the pressure decreases.
- The volume of a gas is inversely related to its pressure at constant temperature. This statement summarizes:
A) Charles’s Law
B) Avogadro’s Law
C) Boyle’s Law
D) Gay-Lussac’s Law
Answer: C) Boyle’s Law
Explanation: Boyle’s Law states that pressure and volume are inversely related at constant temperature, meaning as one increases, the other decreases.
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