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MCQs

Total Questions : 1913 | Page 2 of 192 pages
Question 11. The average translational kinetic energy with which a gas molecule is endowed is dependent on its
  1.    Nature
  2.    Size
  3.    Absolute temperature
  4.    All of the above
 Discuss Question
Answer: Option C. -> Absolute temperature
Question 12. Concentration of a solution expressed in terms of __________ is independent of temperature.
  1.    Molarity
  2.    Normality
  3.    Molality
  4.    None of these
 Discuss Question
Answer: Option C. -> Molality
Question 13. Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the
  1.    Recycling
  2.    Purging
  3.    Bypassing
  4.    Recirculation
 Discuss Question
Answer: Option B. -> Purging
Question 14. Pick out the wrong statement:
  1.    Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve
  2.    At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite
  3.    Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture
  4.    Clapeyron equation is given by,dP/dT = λ/T(VG - VL); where, P = vapor pressure, T = absolute temperature, λ = latent heat of vaporisation, VG and VL = vol
 Discuss Question
Answer: Option C. -> Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture
Question 15. Which of the following gases is the most soluble in water?
  1.    NH₃
  2.    CO₂
  3.    H₂S
  4.    CH₄
 Discuss Question
Answer: Option A. -> NH₃
Question 16. Internal energy of a substance comprises of the __________ energy.
  1.    Vibrational
  2.    Rotational
  3.    Translational
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 17. At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to
  1.    Decrease in mean free path
  2.    Increased collision rate among molecules
  3.    Increase in molecular attraction
  4.    Increase in average molecular speed
 Discuss Question
Answer: Option C. -> Increase in molecular attraction
Question 18. Which of the following is insensitive to changes in pressure?
  1.    Heat of vaporisation
  2.    Melting point
  3.    Heat of fusion
  4.    Both B & C
 Discuss Question
Answer: Option D. -> Both B & C
Question 19. 1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?
  1.    5
  2.    10
  3.    15
  4.    20
 Discuss Question
Answer: Option B. -> 10
Question 20. Number of gram equivalent of solute dissolved in one litre of solution is called its
  1.    Normally
  2.    Molarity
  3.    Molality
  4.    Formality
 Discuss Question
Answer: Option A. -> Normally

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