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MCQs

Total Questions : 30 | Page 1 of 3 pages
Question 1. The process in which the solid changes directly into vapors without changing in the liquid state is called
  1.    condensation
  2.    evaporation
  3.    boiling
  4.    sublimation
 Discuss Question
Answer: Option D. -> sublimation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Conversion of a liquid to a gas at all temperatures is called
  1.    sublimation
  2.    evaporation
  3.    condensation
  4.    boiling
 Discuss Question
Answer: Option B. -> evaporation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. The molecules of liquid which escape first have
  1.    highest kinetic energy
  2.    lowest kinetic energy
  3.    moderate kinetic energy
  4.    infinite kinetic energy
 Discuss Question
Answer: Option A. -> highest kinetic energy
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. At constant pressure the average kinetic energy of gas molecules increases 2 times if
  1.    temperature is increased by 2 times
  2.    temperature is halved
  3.    no change in temperature
  4.    temperature remains constant
 Discuss Question
Answer: Option A. -> temperature is increased by 2 times
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. The average kinetic energy of gas molecules is directly proportional to
  1.    T2
  2.    √T
  3.    T
  4.    2T
 Discuss Question
Answer: Option C. -> T
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. The mathematical expression that describes Boyle's law is
  1.    PV = constant
  2.    V * constant = P
  3.    P * constant = V
  4.    V ⁄ P = constant
 Discuss Question
Answer: Option A. -> PV = constant
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. For a certain reaction PV = 2 dm3 atm and volume is 4 dm3 then the corresponding pressure is
  1.    1 atm
  2.    4 atm
  3.    0.5 atm
  4.    2 atm
 Discuss Question
Answer: Option C. -> 0.5 atm
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. The temperature at which the solid starts melting is called
  1.    boiling point
  2.    freezing point
  3.    melting point
  4.    sublimating point
 Discuss Question
Answer: Option C. -> melting point
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. On increasing the temperature of amorphous solid they
  1.    melt at specific temperature
  2.    soften gradually
  3.    break at specific temperature
  4.    boil at specific temperature
 Discuss Question
Answer: Option B. -> soften gradually
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. The pressure that vapors apply on the surface of the liquid at equilibrium is called
  1.    torr
  2.    vapor pressure
  3.    liquid pressure
  4.    condensation
 Discuss Question
Answer: Option B. -> vapor pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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