The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation
At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ?
For an ideal solution, the total vapor pressure varies __________ with the composition(expressed as mole fraction).
Pick out the wrong statement.
1 gm mole of an alcohol whose molecular weight iscontainsgms of carbon,gms of hydrogen andgms of oxygen. Its molecular formula is
A solution with reasonably permanent pH is called a/an __________ solution.
One kg of saturated steam at 100°C and 1.bar is contained in a rigid walled vessel. It lias a volume of 1.m3. It cools to 98°C ; the saturation pressure is 0.bar ; one kg of water vapour under these conditions has a volume of 1.m3. The latent heat of condensation (kJ/kg-1 ) under these conditions is
The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.
The value of gas constant 'R' is __________ kcal/kg.mole.°C.
'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the
NaOH contains __________ percent oxygen.
One micron is equal to __________ cm.
A vapor that exists above its critical temperature is termed as a __________ vapor.
Heat of transition is the heat evolved or absorbed, when a substance is converted from
Size range of the colloidals particles is
1 torr is equal to __________ mm Hg column.
For a neutral solution (pH = 7), the value of[H+] [OH-] is equal to
1 kg/m2 is equal to __________ mm water column.
Measurement of the amount of dry gas collected over water from volume of moist gas is based on the
The value of Trouton's ratio (λb/Tb) for a number of substances is(where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids.
Heat of __________ of a fuel is called its calorific value.
Diffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume 'X' diffuses twice as fast as another perfume 'Y'; what is the molecular weight of 'Y', if the vapor density of gas 'X' is 2 ? Molecular weight of gas 'X' is to be assumed to be 2.
Heat of transition is the heat evolved or absorbed, when a substance is converted from
Which of the following gravity scales is used exclusively for liquids heavier than water ?
For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.
An equation for calculating vapour pressure is given by, log10 P = A - B(t + c). This is called the
The value of the gas-law constant 'R' is 1.987
In physical adsorption, as compared to chemisorption, the
Size range of the colloidals particles is
Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263°C and 2 atm.
The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour
A solution is made by dissolving 1 kilo mole of solute inkg of solvent. The molality of the solution is
Molar heat capacity of water in equilibrium with ice at constant pressure is
Which of the following is not a colligative property ?
S.T.P. corresponds to
One Newton is equal to __________ dynes.
One micron is equal to
Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the
Average molecular weight of air is about
6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be __________ gm.
If pH value of a solution isthen its pOH value will be
Atoms of the same element, but of different masses are called
With rise in pressure, the solubility of gases in solvent, at a fixed temperature
A very dilute solution is prepared by dissolving 'x1' mole of solute in 'x2' mole of a solvent. The mole fraction of solute is approximately equal to
An ideal gas can be liquified, because
Pick out the wrong statement.
1 kgf/cm2 is not equal to
For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is
The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of
pH value of an alkaline solution is