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MCQs

Total Questions : 2096 | Page 24 of 210 pages
Question 231. Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be
  1.    580
  2.    640
  3.    1160
  4.    Data insufficient; can't be computed
 Discuss Question
Answer: Option C. -> 1160
Question 232. The adiabatic throttling process of a perfect gas is one of constant enthalpy
  1.    In which there is a temperature drop
  2.    Which is exemplified by a non-steady flow expansion
  3.    Which can be performed in a pipe with a constriction
  4.    In which there is an increase in temperature
 Discuss Question
Answer: Option C. -> Which can be performed in a pipe with a constriction
Question 233. Number of phases in a colloidal system are
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Question 234. The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
  1.    Less than
  2.    More than
  3.    Same as
  4.    Not related to
 Discuss Question
Answer: Option C. -> Same as
Question 235. Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.
  1.    The same
  2.    Less than
  3.    Greater than
  4.    Different than
 Discuss Question
Answer: Option A. -> The same
Question 236. In case of the decomposition of hydroiodic acid (2HI ⇋ H₂ + I₂), addition of H₂ (at equilibrium condition) will
  1.    Increase the partial pressure of I₂
  2.    Decrease the partial pressure of HI
  3.    Diminish the degree of dissociation of HI
  4.    None of these
 Discuss Question
Answer: Option C. -> Diminish the degree of dissociation of HI
Question 237. __________ does not change during phase transformation processes like sublimation, melting & vaporisation.
  1.    Entropy
  2.    Gibbs free energy
  3.    Internal energy
  4.    All of the above
 Discuss Question
Answer: Option B. -> Gibbs free energy
Question 238. Adiabatic compression of a saturated water vapour makes it
  1.    Supersaturated
  2.    Superheated
  3.    Both A and B
  4.    Neither A nor B
 Discuss Question
Answer: Option B. -> Superheated
Question 239. Standard temperature and pressure (S.T.P.) is
  1.    0°C and 750 mm Hg
  2.    15°C and 750 mm Hg
  3.    0°C and 1 kgf/cm²
  4.    15°C and 1 kgf/cm²
 Discuss Question
Answer: Option A. -> 0°C and 750 mm Hg
Question 240. In case of an __________ process, the temperature of the system increases.
  1.    Isothermal compression
  2.    Isothermal expansion
  3.    Adiabatic expansion
  4.    Adiabatic compression
 Discuss Question
Answer: Option D. -> Adiabatic compression

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