Month: November 2020
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1st law of thermodynamics is nothing but the law of conservation of
A. Momentum B. Mass C. Energy D. None of these
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Specific/molar Gibbs free energy for a pure substance does not change during
A. Sublimation B. Vaporisation C. Melting D. Either A, B or C
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In a turbine, the fluid expands almost
A. Isothermally B. Isobarically C. Adiabatically D. None of these
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If two gases have same reduced temperature and reduced pressure, then they will have the same
A. Volume B. Mass C. Critical temperature D. None of these
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__________ does not change during phase transformation processes like sublimation, melting & vaporisation.
A. Entropy B. Gibbs free energy C. Internal energy D. All of the above
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In case of the decomposition of hydroiodic acid (2HI ⇋ H₂ + I₂), addition of H₂ (at equilibrium condition) will
A. Increase the partial pressure of I₂ B. Decrease the partial pressure of HI C. Diminish the degree of dissociation of HI D. None…
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For an isothermal process, the internal energy of a gas
A. Increases B. Decreases C. Remains unchanged D. Data insufficient, can’t be predicted
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For an ideal gas, the activity co-efficient is
A. Directly proportional to pressure B. Inversely proportional to pressure C. Unity at all pressures D. None of these
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In case of an __________ process, the temperature of the system increases.
A. Isothermal compression B. Isothermal expansion C. Adiabatic expansion D. Adiabatic compression
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Standard temperature and pressure (S.T.P.) is
A. 0°C and 750 mm Hg B. 15°C and 750 mm Hg C. 0°C and 1 kgf/cm² D. 15°C and 1 kgf/cm²