One micron is equal to _____________ cm?

Related Mcqs:

1. Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the ‘corresponding states’. At equal reduced conditions i.e., at the corresponding state, the ____________ of different gases are nearly the same?

   A. Compressibility
   B. Molecular weight
   C. Humidity
   D. None of these

2. 1 BTU/ft3 is approximately equal to _____________ kcal/m3?

   A. 1
   B. 9
   C. 4
   D. 252

3. “The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes”. This is the _____________ law?

   A. Dalton’s
   B. Amagat’s
   C. Gay-Lussac’s
   D. Avogadro’s

4. Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?

   A. 46
   B. 92
   C. -23
   D. -92

5. The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal _____________ in the two phases?

   A. Potential energy
   B. Intermolecular forces
   C. Kinetic energy
   D. Total energy

6. The heat of adsorption of a gas caused by Van der Waals forces of attraction and capillarity is equal to the heat of__________________?

   A. Normal condensation
   B. Wetting
   C. Sum of A. and B.
   D. Difference of A. and B.

7. 1m3 is approximately equal to_________________?

   A. 28 litres
   B. 35 ft3
   C. 4.5 litres
   D. 4.5 ft3

8. A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct ?

   A. Xc > Xs
   B. Xc = Xs
   C. Xc < Xs
   D. Xc greater/less than Xs depending on the length of the cylinder

9. “The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?

   A. Law of Petit and Dulong
   B. Kopp’s rule
   C. Nernst heat theorem
   D. Trouton’s rule

10. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?

    A. Bubble point
    B. Saturation temperature
    C. Dew point
    D. Both B. and C.