Avogadro number is the number of molecules in one ____________ of a gas?

Related Mcqs:

1. Avogadro’s number is equal to__________________?

   A. 6.023 × 1023 molecules/kg.mole
   B. 6.023 × 1023 molecules/gm.mole
   C. 6.023 × 1016 molecules/kg.mole
   D. 6.023 × 1026 molecules/gm.mole

2. If 1 Nm3 of O2 contains ‘N’ number of molecules, then number of molecules in 2Nm3 of SO2 will be_________________?

   A. N
   B. N/2
   C. 2N
   D. 4N

3. Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?

   A. Do not lose energy on collision
   B. Are above the inversion temperature
   C. Do not exert attractive force on each other
   D. Do work equal to loss in kinetic energy

4. The density of a gas ‘X’ is twice that of another gas ‘Y’. If the molecular weight of gas ‘Y’ is ‘M’; then the molecular weight of the gas ‘X’ will be________________?

   A. 2M
   B. M/2
   C. M
   D. M/4

5. At a temperature of 0°K, the molecules of a gas have only _______________ energy?

   A. Rotational
   B. Vibrational
   C. Translational
   D. None of these

6. Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?

   A. Nature of the liquid
   B. Nature of the gas
   C. Temperature of the liquid
   D. Total pressure

7. The density of a gas at N.T.P.is ‘ρ’. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75 ρ at a temperature of ____________ °K?

   A. 273°
   B. 300°
   C. 400°
   D. 373°

8. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal______________?

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

9. The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 × __________?

   A. 1026
   B. 1023
   C. 1020
   D. 1019

10. 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