Absolute zero pressure can be attained at a temperature of___________________?

Related Mcqs:

1. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at________________?

   A. High vacuum
   B. Zero pressure
   C. 0°K
   D. Earth’s centre

2. 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

3. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?

   A. T
   B. 1/T
   C. T2
   D. 1/T2

4. Change in volume of metals from absolute zero temperature to their melting points is___________________?

   A. Almost same for all metals
   B. Different for different metals
   C. Less for low melting point metals
   D. Less for high melting point metals

5. At absolute zero temperature, for any reaction involving condensed phases ?

   A. Δ G° = 0 , Δ H° = 0
   B. Δ H° = 0 , Δ S° = 0
   C. Δ S° = 0 , Δ E° = 0
   D. Δ S° = 0 , Δ Cp° = 0

6. Temperature attained in soldering of metals is about ________________ °C?

   A. 150-300
   B. 400-500
   C. 650-800
   D. 1000-1100

7. The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to _____________ °D ?

   A. 140
   B. 180
   C. 240
   D. 280

8. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?

   A. Tempering
   B. Hardening
   C. Annealing
   D. Normalising

9. The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?

   A. Air
   B. Water
   C. Mercury
   D. Alcohol

10. The critical pressure at which the latent heat of vaporization of steam becomes zero is _____________ Kg/cm2 ?

    A. 273.15
    B. 225.65
    C. 100.03
    D. 373.15