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MCQs

Total Questions : 2096 | Page 11 of 210 pages
Question 101. Third law of thermodynamics is concerned with the
  1.    Value of absolute entropy
  2.    Energy transfer
  3.    Direction of energy transfer
  4.    None of these
 Discuss Question
Answer: Option A. -> Value of absolute entropy
Question 102. Second law of thermodynamics is concerned with the
  1.    Amount of energy transferred
  2.    Direction of energy transfer
  3.    Irreversible processes only
  4.    Non-cyclic processes only
 Discuss Question
Answer: Option B. -> Direction of energy transfer
Question 103. Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.
  1.    Ideal
  2.    Real
  3.    Isotonic
  4.    None of these
 Discuss Question
Answer: Option A. -> Ideal
Question 104. Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be
  1.    Same
  2.    Doubled
  3.    Halved
  4.    One fourth of its original value
 Discuss Question
Answer: Option A. -> Same
Question 105. Internal energy change of a system over one complete cycle in a cyclic process is
  1.    Zero
  2.    +ve
  3.    -ve
  4.    Dependent on the path
 Discuss Question
Answer: Option A. -> Zero
Question 106. Work done in case of free expansion is
  1.    Indeterminate
  2.    Zero
  3.    Negative
  4.    None of these
 Discuss Question
Answer: Option B. -> Zero
Question 107. Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which
  1.    A homogeneous solution (say of phenol water) is formed
  2.    Mutual solubility of the two liquids shows a decreasing trend
  3.    Two liquids are completely separated into two layers
  4.    None of these
 Discuss Question
Answer: Option A. -> A homogeneous solution (say of phenol water) is formed
Question 108. In which of the following reaction equilibria, the value of equilibrium constant Kp will be more than is Kc?
  1.    2HI ⇋ H₂ + I₂
  2.    N₂O₄ ⇋ 2NO₂
  3.    2SO₂ + O₂ ⇋ 2SO₃
  4.    None of these
 Discuss Question
Answer: Option B. -> N₂O₄ ⇋ 2NO₂
Question 109. As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then approaches
  1.    Unity
  2.    Zero
  3.    That of the heat of reaction
  4.    Infinity
 Discuss Question
Answer: Option B. -> Zero
Question 110. Reduced pressure of a gas is the ratio of its
  1.    Pressure to critical pressure
  2.    Critical pressure to pressure
  3.    Pressure to pseudocritical pressure
  4.    Pseudocritical pressure to pressure
 Discuss Question
Answer: Option A. -> Pressure to critical pressure

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