Stoichiometry Questions

• Which of the following is not a unit of pressure?
• The atomic heat capacities of all solid elements __________ with decrease in temperature.
• The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 x __________
• Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution).
• A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is
• Raoult's law is not applicable to the
• 2 litres of nitrogen at N.T.P. weighs __________ gms.
• The density of a liquid is 1500 kg/m3. Its value in gin/litre will be equal to
• The unit of dynamic viscosity is
• The unit of specific heat at constant pressure, Cp, in SI unit is
• Cp/Cv for monoatomic gases is
• The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is
• The reverse process of fractional crystallisation is called
• Molality is defined as the number of gm moles of solute per __________ of solvent.
• Saturated molal absolute humidity of the vapor-gas mixture depends upon the
• Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3 . The diffusivity of aniline in air is 0.74xl0-5m2/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are
• The heat of vaporisation __________ with increase in pressure.
• A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of
• A gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c.
• NaOH contains __________ percent oxygen.