Lakshya Education MCQs

Question: If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them. This is __________ law.
Options:
A.Hess's
B.Kirchoff's
C.Lavoisier and Laplace
D.None of these
Answer: Option A

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More Questions on This Topic :

Question 1. If atmospheric temperature and dew point are nearly equal, then the relative humidity is
  1.    Zero
  2.    50%
  3.    Almost 100%
  4.    Unpredictable
Answer: Option C
Question 2. First law of thermodynamics deals with the
  1.    Direction of energy transfer
  2.    Reversible processes only
  3.    Irreversible processes only
  4.    None of these
Answer: Option A
Question 3. In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is
  1.    More
  2.    Less
  3.    Same
  4.    Unpredictable; depends on the particular reaction
Answer: Option C
Question 4. When pressure is applied on the system, ice ⟷ water, then
  1.    Equilibrium can not be established
  2.    More ice will be formed
  3.    More water will be formed
  4.    Evaporation of water will take place
Answer: Option C
Question 5. 1m³ of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be
  1.    35 K
  2.    174 K
  3.    274 K
  4.    154 K
Answer: Option C
Question 6. Extensive properties of a thermodynamic system depend upon the __________ of the system.
  1.    Specific volume
  2.    Temperature
  3.    Mass
  4.    Pressure
Answer: Option C

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