The activity of pure hydrogen gas at 1000°C and 5 atm pressure_________________?

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. 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

3. 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

4. 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

5. While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ × Tm (where, Tm Melting temperature) ?

   A. 0.25
   B. 0.45
   C. 0.70
   D. 0.95

6. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?

   A. 130
   B. 180
   C. 230
   D. 250

7. Hydrogen in liquid steels is dissolved_________________?

   A. As tiny gas bubbles
   B. In the atomic form
   C. In the ionic form
   D. In the molecular form

8. The phenomenon occurring during explosion of a hydrogen bomb is___________________?

   A. Nuclear fission
   B. Nuclear fusion
   C. A combination of both nuclear fission & fusion
   D. None of these

9. While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about _____________ °C ?

   A. 1800
   B. 2000
   C. 2400
   D. 3000

10. Hydrogen can be ________________?

    A. Used in I.C. engines as fuel
    B. Liquefied & stored under cryogenic conditions
    C. Produced by electrolysis of water
    D. All (A), B. & C.