For an ideal gas, Cp – Cv is____________________?

Related Mcqs:

1. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?

   A. √T
   B. 1/√P
   C. √y
   D. 1/√ρ

2. In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?

   A. ΔQ = 0, ΔS=0
   B. ΔQ = 0, ΔS = +ve
   C. ΔQ = 0, ΔS = -ve
   D. ΔQ = +ve, ΔS= +ve

3. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its_______________?

   A. Aqueous tension
   B. Saturated humidity
   C. Vapor pressure
   D. Absolute humidity

4. Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that_________________?

   A. Pure oxygen has been used for combustion
   B. Nitrogen percentage in the fuel is very high
   C. Excess air has been used for combustion
   D. Hydrogen is not present in the fuel

5. Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________________ kJ ?

   A. +4000
   B. -4000
   C. 10000
   D. -10000

6. Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is____________________?

   A. Very low which prevents their ignition by compression
   B. Very high which prevents their ignition by compression
   C. Zero
   D. None of these

7. One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is____________________?

   A. 100
   B. 900
   C. 9000
   D. 10000

8. Ultimate strength in tension as compared to that in shear for steel is____________________?

   A. Half
   B. One third
   C. One and half times
   D. One fourth

9. Main constituent of bone ash is____________________?

   A. Ammonium phosphate
   B. Calcium phosphate
   C. Animal charcoal
   D. Ammonium sulphate

10. The trace metal present in insulin is____________________?

    A. Cu
    B. Zn
    C. Fe
    D. Ni