Physical Chemistry PYQs – Chemistry, SSC & Railway

Topic:Gas Laws
Boyle's Law:At constant temperature, pressure and volume of a fixed amount of gas are inversely proportional.
Formula:P ∝ 1/VorPV = constant
Other laws:
Charles's Law → V ∝ T (at constant P)
Gay-Lussac's Law → P ∝ T (at constant V)
Avogadro's Law → V ∝ n (at constant P, T)
Answer: Option 4 → Boyle's Law

States: At constant temperature, pressure of a gas is inversely proportional to its volume.
Formula: P ∝(1)/(V)or PV = constant
Key Point: Temperature remains constant while P and V vary inversely.
Answer: Option 1 → Volume And Pressure

Statement 1: True — ideal gas molecules have negligible volume.
Statement 2: False — ideal gas molecules have NO intermolecular attractive forces.
Statement 3: True — collisions are perfectly elastic. Answer: 1 and 3 only