Stoichiometry Quiz 2

At a temperature of 0?K, the molecules of a gas have only ________ energy?

Addition of a non-volatile solute to a pure solvent ______?

Addition of zircon to silica refractory brick improves its__________?

At higher temperature, molal heat capacities of most of the gases (at constant pressure) _____ with increase in temperature?

Density of carbon dioxide is __________ kg/Nm3 ?

Atomic _______ of an element is a whole number?

According to Raoult?s law, ?The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component.? Raoult?s law is not applicable under the following assumption/condition?

Boiling point of a non-homogeneous mixture of immiscible liquids is ______ that of any one of its separate components?

Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900?C ) use, except_______?

An Azeotropic solution of two liquids has boiling point lower than either of them, when it______?

At 100?C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100?C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150?C is 4.69 atm. At 150?C, the vapour pressure of methylcyclohexane would be expected to be__________?

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

Dry air is a mixture of___________?

At standard conditions, N2 + 2O2 ? 2NO2; ?G? = 100 kJ/mole NO + ?O2 ? 2NO2; ?G? = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is_____?

Average molecular weight of air is about ______?

Avogadro?s number is equal to___________?

An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture ?

An equation for calculating vapour pressure is given by, log10 P = A ? B(t + c). This is called the_________?

An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is_______?

Cp is expressed in S.I. unit as________?

According to the kinetic theory, the thermal conductivity of a monatomic gas is proportional to_____?

Carborundum used for making crucibles for melting non-ferrous metals is chemically_________?

As per Kirchhoff s equation, the heat of reaction is affected by the___________?

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 ?

Applicability of Clausius-Clapeyron Equation is subject to the condition that the ___________?

Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called__________?

Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of _________?

Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of_________?

At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to_____?

Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100?C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is___________?

Clausius Clapeyron equation applies to the ______ process?

Disappearance of snow in subzero weather exemplifies the process of__________?

An ideal gas can be liquefied, because _____?

Elements in a periodic table are arranged in order of their___________?

Atmospheric pressure corresponds to a hydrostatic head of__________?

Cp ? Cv for an ideal gas is equal to_________?

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 ?

Concentration of a solution expressed in terms of ________ is independent of temperature?

Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263?C and 2 atm ?

Addition of a non-volatile solute to a solvent produces a _______ in its solvent?

Chemically, mullite refractories is_________?

At higher temperatures, molal heat capacities for most of the gases (at constant pressure) ________ with increase in temperature?

Boiling point of a solution as compared to that of the corresponding solvent is __________?

Atoms of the same element, but of different masses are called___________?

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_____?

Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution) ?

Air at a temperature of 20?C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity? Vapour pressure of water at 20?C is 17.5 mm Hg?

Equal masses of CH4 and H2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is_____?

At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be __________?

Dissolving a solute in a solvent does not change its_________?