Which of the following decreases with increase in pressure ?

Related Mcqs:

1. With increase in pressure (above atmospheric pressure), the Cp of a gas_____________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. First decreases and then increases

2. The freezing point of a liquid decreases when the pressure is increased, if the liquid ____________ while freezing?

   A. Contracts
   B. Expands
   C. Does not change in volume
   D. Either (A), B. or (C)

3. In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about _____________ percent?

   A. 0.25
   B. 0.5
   C. 0.75
   D. 1

4. With increase in ___________________ Knocking tendency in a spark ignition petrol engine decreases?

   A. Supercharging
   B. Wall temperature
   C. Compression ratio
   D. Engine speed

5. Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is____________________?

   A. 10 atm-1
   B. 105 atm-1
   C. 10 (dimensionless)
   D. 105 (dimensionless)

6. 500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be _____________ mm Hg?

   A. 650
   B. 700
   C. 600
   D. 375

7. The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?

   A. 0.07
   B. 0.09
   C. 0.11
   D. 0.13

8. Pick out the wrong statement. A. The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction________________?

   B. With increase in temperature, the equilibrium constant increases for an exothermic reaction
   C. The equilibrium constant of a reaction depends upon temperature only
   D. The conversion for a gas phase reaction increases with increase in pressure, if there is a
   decrease in volume accompanying the reaction

9. If we increase the pressure on a substance (which is at its triple point), then the triple point __________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. May increase or decrease; depends on the substance

10. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?

    A. Decreases
    B. Increases
    C. Remains constant
    D. Decreases logarithmically