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MCQs

Total Questions : 1913 | Page 20 of 192 pages
Question 191. The viscosity of water at room temperature may be around one
  1.    Centipoise
  2.    Poise
  3.    Stoke
  4.    Both B & C
 Discuss Question
Answer: Option A. -> Centipoise
Question 192. A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be
  1.    0°C
  2.    0°K
  3.    -136.5°C
  4.    -136.5°K
 Discuss Question
Answer: Option C. -> -136.5°C
Question 193. A vapor that exists above its critical temperature is termed as a __________ vapor.
  1.    Saturated
  2.    Unsaturated
  3.    Gaseous
  4.    Sub-cooled
 Discuss Question
Answer: Option C. -> Gaseous
Question 194. A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be
  1.    -136.5°C
  2.    - 136.5°K
  3.    -273°C
  4.    0°K
 Discuss Question
Answer: Option A. -> -136.5°C
Question 195. Which of the following is not a unit of kinematic viscosity?
  1.    Poise
  2.    Stoke
  3.    Cm²/second
  4.    None of these
 Discuss Question
Answer: Option A. -> Poise
Question 196. The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be
  1.    2M
  2.    M/2
  3.    M
  4.    M/4
 Discuss Question
Answer: Option A. -> 2M
Question 197. Pick out the wrong statement.
  1.    Heat capacity of a diatomic gas is higher than that of a monoatomic gas
  2.    Equal volumes of Argon and Krypton contain equal number of atoms
  3.    Total number of molecules contained in 22.4 litres of hydrogen at NTP is 6.023 x 1023
  4.    The binary mixture of a particular com-positidn in both vapor and liquid state is known as an azeotropic mixture
 Discuss Question
Answer: Option B. -> Equal volumes of Argon and Krypton contain equal number of atoms
Question 198. Ideal solution is formed, when its components have zero
  1.    Heat of mixing
  2.    Volume change
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 199. The heat evolved in the combustion of benzene is represented by the equation: C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole.
  1.    +816.15
  2.    +1632.3
  3.    -1632.3
  4.    -2448.45
 Discuss Question
Answer: Option C. -> -1632.3
Question 200. If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.
  1.    10
  2.    20
  3.    70
  4.    100
 Discuss Question
Answer: Option A. -> 10

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