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MCQs

Total Questions : 1913 | Page 3 of 192 pages
Question 21. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?
  1.    Temperature
  2.    Nature of solute
  3.    Pressure
  4.    Nature of solvent
 Discuss Question
Answer: Option C. -> Pressure
Question 22. Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is
  1.    80.1°C
  2.    Less than 80.1°C
  3.    100°C
  4.    Greater than 80.1°C but less than 100°C
 Discuss Question
Answer: Option D. -> Greater than 80.1°C but less than 100°C
Question 23. A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the
  1.    Atomic weight of the metal is 4
  2.    Equivalent weight of the metal is 4
  3.    Atomic weight of the metal is 2
  4.    Equivalent weight of the metal is 8
 Discuss Question
Answer: Option B. -> Equivalent weight of the metal is 4
Question 24. Applicability of Claussius-Clapeyron equation is subject to the condition that the
  1.    Vapor follows ideal gas law
  2.    Volume in the liquid state is negligible
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 25. The heats of vaporisation of CS₂, C₂H₅OH &H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is
  1.    H₂O > C₂H₅OH > CS₂
  2.    CS₂ > C₂H₅OH > H₂O
  3.    H₂O > CS₂ > C₂H₅OH
  4.    CS₂ > H₂O > C₂H₅OH
 Discuss Question
Answer: Option A. -> H₂O > C₂H₅OH > CS₂
Question 26. The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of
  1.    Normal condensation
  2.    Wetting
  3.    Sum of A and B
  4.    Difference of A and B
 Discuss Question
Answer: Option C. -> Sum of A and B
Question 27. __________ equation relates latent heat and boiling point.
  1.    Antonie
  2.    Kistyakowsky
  3.    Kopp's
  4.    Trouton's
 Discuss Question
Answer: Option D. -> Trouton's
Question 28. 1 Kcal/kg. °C is equivalent to __________ BTU/lb. °F.
  1.    1
  2.    2.42
  3.    4.97
  4.    None of these
 Discuss Question
Answer: Option A. -> 1
Question 29. Average molecular weight of air is about
  1.    21
  2.    29
  3.    23
  4.    79
 Discuss Question
Answer: Option B. -> 29
Question 30. If 1 Nm³ of O₂ contains 'N' number of molecules, then number of molecules in 2Nm³ of SO₂ will be
  1.    N
  2.    N/2
  3.    2N
  4.    4N
 Discuss Question
Answer: Option C. -> 2N

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