## Real gases and Vander Waal's equation MCQ Advance Level

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules

•  Are above the inversion temperature
•  Exert no attractive force on each other
•  Do work equal to loss in kinetic energy
•  Collide without loss of energy

Exert no attractive force on each other

Q2. A gas is said to behave like an ideal gas when the relation PV/T = constant . When do you expect a real gas to behave like an ideal gas

•  When the temperature is low
•  When both the temperature and pressure are low
•  When both the temperature and pressure are high
•  When the temperature is high and pressure is low

When the temperature is high and pressure is low

Q3. A real gas most closely approaches the behaviour of an ideal gas at

•  15 atm and 200 K
•  1 atm and 273 K
•  0.5 atm and 500 K
•  15 atm and 500 K

0.5 atm and 500 K

Q4. The temperature at which real gases obey the ideal gas laws over a wide range of pressure is called

•  Critical temperature
•  Boyle temperature
•  Inversion temperature
•  Reduced temperature

Boyle temperature

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