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?
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?
1 centipoise is equivalent to
1 centipoise is equivalent to
CaCO₃ contains __________ percent of Ca by weight.
CaCO₃ contains __________ percent of Ca by weight.
An ideal gas can be liquified, because
An ideal gas can be liquified, because
Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).
Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).
The heat change for the reaction, C(s) + 2S(s) → CS₂(l), is 104.2 kJ. It represents the heat of
The heat change for the reaction, C(s) + 2S(s) → CS₂(l), is 104.2 kJ. It represents the heat of
The unit of specific heat at constant pressure, Cp, in SI unit is
The unit of specific heat at constant pressure, Cp, in SI unit is
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because
Dissolving a solute in a solvent does not change its
Dissolving a solute in a solvent does not change its
1 kg/cm² is equal to
1 kg/cm² is equal to
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
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
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. The rate of evaporation of aniline is 2.97 x 10⁻⁴. Its units are
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. The rate of evaporation of aniline is 2.97 x 10⁻⁴. Its units are
The density of a liquid is 1500 kg/m³. Its value in gin/litre will be equal to
The density of a liquid is 1500 kg/m³. Its value in gin/litre will be equal to
One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The latent heat of condensation (kJ/kg⁻¹ ) under these conditions is
One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The latent heat of condensation (kJ/kg⁻¹ ) under these conditions is
The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
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
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
The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.
The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.
The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface. This statement pertaining to the solubility of gases in liquid is the __________ law.
The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface. This statement pertaining to the solubility of gases in liquid is the __________ law.
2 litres of nitrogen at N.T.P. weighs __________ gms.
2 litres of nitrogen at N.T.P. weighs __________ gms.
1 kgf/cm² is not equal to
1 kgf/cm² is not equal to
Heat of reaction is not influenced by
Heat of reaction is not influenced by
With increase in temperature, the surface tension of water
With increase in temperature, the surface tension of water
Density of carbon dioxide is __________ kg/Nm³.
Density of carbon dioxide is __________ kg/Nm³.
At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is
40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is
Ideal solution is formed, when its components have zero
Ideal solution is formed, when its components have zero
Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas.
Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas.
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
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
The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately
The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately
A 'limiting reactant' is the one, which decides the __________ in the chemical reacation.
A 'limiting reactant' is the one, which decides the __________ in the chemical reacation.
In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the
In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the
The number of H⁺ in 1 c.c solution of pH 13 is
The number of H⁺ in 1 c.c solution of pH 13 is
The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?
The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?
Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature?
Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature?
Kinetic theory of gases stipulates that, the
Kinetic theory of gases stipulates that, the
The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 x __________
The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 x __________
Which of the following ratios defines the recycle ratio in a chemical process?
Which of the following ratios defines the recycle ratio in a chemical process?
Pick out the wrong statement.
Pick out the wrong statement.
One Newton is equal to __________ dynes.
One Newton is equal to __________ dynes.
The combustion equations of carbon and carbon monoxide are as follows:
C + O₂ = CO₂, ΔH = - 394 kJ/kg . mole CO + 1/2 O₂ = CO₂, ΔH = - 284.5 kJ/kg. mole.
The heat of formation of CO is __________ kJ/kg. mole.
The combustion equations of carbon and carbon monoxide are as follows:
C + O₂ = CO₂, ΔH = - 394 kJ/kg . mole CO + 1/2 O₂ = CO₂, ΔH = - 284.5 kJ/kg. mole.
The heat of formation of CO is __________ kJ/kg. mole.
Cp equals Cv at
Cp equals Cv at
Pick out the wrong statement.
Pick out the wrong statement.
What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively?
What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively?
Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules
Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules
The OH⁻ concentration in a solution having pH value 3 is
The OH⁻ concentration in a solution having pH value 3 is
Which of the following is not a unit of kinematic viscosity?
Which of the following is not a unit of kinematic viscosity?
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 solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of
Volume occupied by one gm mole of a gas at S.T.P. is
Volume occupied by one gm mole of a gas at S.T.P. is
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 liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is
The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is
Cp is expressed in S.I. unit as
Cp is expressed in S.I. unit as
Cp - Cv, for an ideal gas is equal to
Cp - Cv, for an ideal gas is equal to
A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be
A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be
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
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
Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.
Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.
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
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
For estimation of heat capacity of a solid compound, one can use
For estimation of heat capacity of a solid compound, one can use
A bypass stream in a chemical process is useful, because it
A bypass stream in a chemical process is useful, because it
Pick out the wrong statement.
Pick out the wrong statement.
Vapor pressure of water at 100°C is about __________ bar.
Vapor pressure of water at 100°C is about __________ bar.
Na₂SO₄. 10H₂O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na₂SO₄. The final concentration of the solute in the solution is 10%. The weight of crystals is
Na₂SO₄. 10H₂O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na₂SO₄. The final concentration of the solute in the solution is 10%. The weight of crystals is
A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis
A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis
With rise in temperature, the solubility of ammonia in water at a fixed pressure
With rise in temperature, the solubility of ammonia in water at a fixed pressure
1 torr is equivalent to
1 torr is equivalent to
Cp/Cv for monoatomic gases is
Cp/Cv for monoatomic gases is
80 kg of Na₂SO₄ (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na₂SO₄ .10H₂O crystals separate out. The weight fraction of Na₂SO₄ in the remaining solution is
80 kg of Na₂SO₄ (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na₂SO₄ .10H₂O crystals separate out. The weight fraction of Na₂SO₄ in the remaining solution is
Number of gm moles of solute dissolved in 1 kg of solvent is called its
Number of gm moles of solute dissolved in 1 kg of solvent is called its
1m³ is approximately equal to
1m³ is approximately equal to
1 ata is equivalent to
1 ata is equivalent to
Percentage saturation of a vapor bearing gas is always __________ the relative saturation.
Percentage saturation of a vapor bearing gas is always __________ the relative saturation.
Heat of transition is the heat evolved or absorbed, when a substance is converted from
Heat of transition is the heat evolved or absorbed, when a substance is converted from
Two solutions A₁ and A₂ have pH value of 2 and 6 respectively. It implies that the solution
Two solutions A₁ and A₂ have pH value of 2 and 6 respectively. It implies that the solution
Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing ) ?
Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing ) ?
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.
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.
The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour
The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour
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
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
The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.
At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.
A vapor that exists above its critical temperature is termed as a __________ vapor.
A vapor that exists above its critical temperature is termed as a __________ vapor.
An equation for calculating vapour pressure is given by, log10 P = A - B(t + c). This is called the
An equation for calculating vapour pressure is given by, log10 P = A - B(t + c). This is called the
Heat of reaction is a function of the
Heat of reaction is a function of the
The vapor pressure of water at 100°C is
The vapor pressure of water at 100°C is
__________ fuels require the maximum percentage of 'excess air' for complete combustion.
__________ fuels require the maximum percentage of 'excess air' for complete combustion.
Pick out the wrong statement.
Pick out the wrong statement.
Which of the following is not used for computing latent heat of vaporisation?
Which of the following is not used for computing latent heat of vaporisation?
Recycling in a chemical process facilitates
Recycling in a chemical process facilitates
Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the
Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the
The heat evolved in the combustion of benzene is represented by the equation:
C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole
The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole.
The heat evolved in the combustion of benzene is represented by the equation:
C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole
The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole.
A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)
A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)
The value of the gas-law constant 'R' is 1.987
The value of the gas-law constant 'R' is 1.987
1 Pascal (unit of pressure) is equal to __________ N/m².
1 Pascal (unit of pressure) is equal to __________ N/m².
A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
The atomic heat capacities of all solid elements __________ with decrease in temperature.
The atomic heat capacities of all solid elements __________ with decrease in temperature.
If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.
If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.
If pH value of a solution is 8, then its pOH value will be
If pH value of a solution is 8, then its pOH value will be
A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be
A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be
The heat of vaporisation __________ with increase in pressure.
The heat of vaporisation __________ with increase in pressure.
The viscosity of water at room temperature may be around one
The viscosity of water at room temperature may be around one
Atomic __________ of an element is a whole number.
Atomic __________ of an element is a whole number.
The total number of atoms in 8.5 gm of NH₃ is __________ x 1023.
The total number of atoms in 8.5 gm of NH₃ is __________ x 1023.
