Stoichiometry Questions

• The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies
• N.T.P. corresponds to
• The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.
• 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
• 1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?
• Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches
• At standard conditions, N2 + 2O2 ⇌ 2NO2; ΔG° = 100 kJ/mole NO + O2 ⇌ 2NO2; ΔG° = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is
• 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?
• Cp equals Cv at
• 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.
• Kinematic viscosity of 1 m2 /second is equivalent to __________ stokes.
• Boiling point of a solution as compared to that of the corresponding solvent is
• Avogadro number is the number of molecules in one __________ of a gas.
• In osmosis through a semi-permeable membrane, diffusion of the
• One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about
• Roult's law is obeyed by a __________ solution.
• Viscosity of atmospheric air may be about __________ centipoise.
• Atomic __________ of an element is a whole number.
• Pick out the wrong unit conversion.