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MCQs

Total Questions : 1913 | Page 21 of 192 pages
Question 201. At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.
  1.    Increases
  2.    Decreases
  3.    Remains unchanged
  4.    Increases linearly
 Discuss Question
Answer: Option A. -> Increases
Question 202. The atomic heat capacities of all solid elements __________ with decrease in temperature.
  1.    Increases
  2.    Decreases
  3.    Remains unchanged
  4.    Approach zero at 0°C
 Discuss Question
Answer: Option B. -> Decreases
Question 203. Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Question 204. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
  1.    Varies linearly
  2.    Increases
  3.    Decreases
  4.    Does not vary
 Discuss Question
Answer: Option B. -> Increases
Question 205. 1 Pascal (unit of pressure) is equal to __________ N/m².
  1.    10
  2.    1
  3.    0.1
  4.    1000
 Discuss Question
Answer: Option B. -> 1
Question 206. The unit of specific heat at constant pressure, Cp, in SI unit is
  1.    W/m²°C
  2.    J/kg°K
  3.    W/m°K
  4.    J/m³°K
 Discuss Question
Answer: Option B. -> J/kg°K
Question 207. Cp - Cv, for an ideal gas is equal to
  1.    R
  2.    R/2
  3.    2R
  4.    3R
 Discuss Question
Answer: Option A. -> R
Question 208. With increase in temperature, the surface tension of water
  1.    Increases
  2.    Decreases
  3.    Remains constant
  4.    Increases linearly
 Discuss Question
Answer: Option B. -> Decreases
Question 209. The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is
  1.    Doubled
  2.    Halved
  3.    Trebled
  4.    Unpredictable
 Discuss Question
Answer: Option D. -> Unpredictable
Question 210. Two solutions A₁ and A₂ have pH value of 2 and 6 respectively. It implies that the solution
  1.    A₁ is more alkaline than solution A₂
  2.    A₁ is highly acidic
  3.    A₁ is very slightly acidic
  4.    Both A & C
 Discuss Question
Answer: Option D. -> Both A & C

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