# States of Matter MCQ

Question 1. For one mole of a gas, the ideal gas equation is

• (a) PV = 1/2RT
• (b) PV = RT
• (c) PV = 3/2RT
• (d) PV = 5/2 RT

Answer:  1. (b) PV = RT

Question 2. The average kinetic energy of the gas molecule is

• (a) inversely proportional to its absolute temperature
• (b) directly proportional to its absolute temperature
• (c) equal to the square of its absolute temperature
• (d) All of the above

Answer:  2. (b) directly proportional to its absolute temperature

Question 3. Which of the following is the correct mathematical relation for Charles law at constant pressure?

• (a) VαT
• (b) Vαt.
• (c) Vα1/T
• (d) all of above

Question 4. At constant temperature, the pressure of the gas is reduced to one-third, the volume

• (a) reduce to one-third
• (b) increases by three times
• (c) remaining the same
• (d) cannot be predicted

Answer:  4. (b) increases by three times

Question 5. With rise in temperature, the surface tension of a liquid

• (a) decreases
• (b) increases
• (c) remaining the same
• (d) none of the above

Question 6. Viscosity of a liquid is a measure of

• (a) repulsive forces between the liquid molecules
• (b) frictional resistance
• (c) intermolecular forces between the molecules
• (d)none of the above

Question 7. The cleansing action of soaps and detergents is due to

• (a) internal friction
• (b) high hydrogen bonding
• (c) viscosity
• (d) surface tensions

Question 8. The compressibility factor, z for an ideal gas is

• (a) zero
• (b) less than one
• (c) greater than one
• (d) equal to one

Answer:  8. (d) equal to one

Question 9. Which of the following gases will have the lowest rate of diffusion?

• (a) H2
• (b) N2
• (C) F2
• (d) O2