*$_Degrees of freedom will be equal to the number of components for a system comprising of?

Partially miscible two liquid components system having two phases

Two liquid components and one solute (soluble in both the liquids)

*$_Boiling point of a non-homogeneous mixture of immiscible liquids is __________ that of any one of its separate components.?

Either A or B; depends on the liquids

*$_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.?

The attractive forces between like and unlike molecules are almost equal

No component is concentrated at the surface of the solution

The component molecules are non polar and are of almost equal size

In the formation of solution, chemical combination/molecular association between unlike molecules takes place

The attractive forces between like and unlike molecules are almost equal

*$_For the gaseous phase reaction, N‚Äö√á√á + O‚Äö√á√á ‚Äö√°√£ 2NO, ≈í√ÆH = + 80 kJ/kg. mole; the decomposition of NO is favoured by?

Increasing the concentration of N‚Äö√á√á

*/*_1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is?

(C‚Äö√á√áH‚Äö√á√ë)2H‚Äö√á√á.OH

*/*_Gases having same reduced temperatures and reduced pressures?

Deviate from ideal gas behaviour to the same degree

Have nearly the same compressibility factor

*/*_The crystallisation of a solute from a solution may be done by?

Removal of pure solvent by evaporation

Change of temperature thereby causing supersaturation

Changing the nature of the system by the addition of a more soluble material

*/*_Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because?

The strong base and strong acid reacts in aqueous solution

The strong base and strong acid reacts completely

The salt formed does not hydrolyse

Only OH‚Äö√Ö¬™ and H‚Äö√Ö‚à´ ions react in every case

The strong base and strong acid reacts in aqueous solution

*/*_Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5¬¨‚àûC).?

¬¨‚àûAPI = (141.5/G) - 131.5

*/*_The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is?

Not a function of the composition of gas mixture

Not a function of the nature of vapor

*/*_One micron is equal to?

10‚Äö√Ö¬™‚Äö√Ö¬• mm

10‚Äö√Ö¬™‚Äö√Ö¬• cm

10‚Äö√Ö¬™‚Äö√Ö‚àÇ m

*/*_Pick out the wrong conversion formula for the conversion of weight units :?

1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton

1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons

*/*_The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.?

Either more or less; depends on the solvent

*/*_A bypass stream in a chemical process is useful, because it?

Facilitates better control of the process

Increases the yield of products

336 + Mcqs in Stoichiometry in Chemical Engineering Page 2 McqOptions

51.	*$_Degrees of freedom will be equal to the number of components for a system comprising of?
A.	Only soluble liquid components
B.	Partially miscible two liquid components system having two phases
C.	Two liquid components and one solute (soluble in both the liquids)
D.	None of these
Answer» B. Partially miscible two liquid components system having two phases

Discussion

52.	*$_Atoms of the same element, but of different masses are called?
A.	Isobars
B.	Isotones
C.	Isotopes
D.	None of these
Answer» D. None of these

Discussion

53.	*$_Boiling point of a non-homogeneous mixture of immiscible liquids is __________ that of any one of its separate components.?
A.	Lower than
B.	Higher than
C.	Equal to
D.	Either A or B; depends on the liquids
Answer» B. Higher than

Discussion

54.	*$_As per Kirchoff s equation, the heat of reaction is affected by the?
A.	Pressure
B.	Volume
C.	Temperature
D.	Molecularity
Answer» D. Molecularity

Discussion

55.	*$_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.?
A.	No component is concentrated at the surface of the solution
B.	The component molecules are non polar and are of almost equal size
C.	In the formation of solution, chemical combination/molecular association between unlike molecules takes place
D.	The attractive forces between like and unlike molecules are almost equal
Answer» D. The attractive forces between like and unlike molecules are almost equal

Discussion

56.	*$_For the gaseous phase reaction, N‚Äö√á√á + O‚Äö√á√á ‚Äö√°√£ 2NO, ≈í√ÆH = + 80 kJ/kg. mole; the decomposition of NO is favoured by?
A.	Increasing the concentration of N‚Äö√á√á
B.	Decrease in temperature
C.	Increase in pressure
D.	Decrease in pressure
Answer» C. Increase in pressure

Discussion

57.	*$_The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.?
A.	Lower than
B.	Higher than
C.	Same as
D.	Not related to
Answer» B. Higher than

Discussion

58.	*$_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?
A.	X1/x2
B.	X2/x1
C.	1 - (x1/x2)
D.	1/x2
Answer» B. X2/x1

Discussion

59.	*$_1 Kcal/kg. ¬¨‚àûC is equivalent to __________ BTU/lb. ¬¨‚àûF.?
A.	1
B.	2.42
C.	4.97
D.	None of these
Answer» B. 2.42

Discussion

60.	/_Vapor pressure of a solution is proportional to(where, Sv and St are mole fraction of solvent and solute respectively).?
A.	Sv
B.	1/St
C.	St
D.	1/Sv
Answer» B. 1/St

Discussion

61.	/_Unit of mass velocity is?
A.	Kg/m . hr
B.	Kg/m¬¨‚â§.hr
C.	Kg/hr
D.	Kg/m¬¨‚â§
Answer» C. Kg/hr

Discussion

62.	/_1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is?
A.	C‚Äö√á√ëH9OH
B.	C‚Äö√á√âH21OH
C.	(C‚Äö√á√áH‚Äö√á√ë)2H‚Äö√á√á.OH
D.	C2H33OH
Answer» B. C‚Äö√á√âH21OH

Discussion

63.	/_Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0¬¨‚àûC will be __________ atmosphere.?
A.	0.5
B.	1
C.	1.5
D.	2
Answer» C. 1.5

Discussion

64.	/_Roult's law is obeyed by a __________ solution.?
A.	Saturated
B.	Molar
C.	Normal
D.	None of these
Answer» E.

Discussion

65.	/_Gases having same reduced temperatures and reduced pressures?
A.	Deviate from ideal gas behaviour to the same degree
B.	Have nearly the same compressibility factor
C.	Both A & B
D.	Neither A nor B
Answer» D. Neither A nor B

Discussion

66.	/_The osmotic pressure of a solution increases, if its __________ is decreased.?
A.	Volume
B.	Solute concentration
C.	Temperature
D.	None of these
Answer» E.

Discussion

67.	/_The crystallisation of a solute from a solution may be done by?
A.	Removal of pure solvent by evaporation
B.	Change of temperature thereby causing supersaturation
C.	Changing the nature of the system by the addition of a more soluble material
D.	All of the above
Answer» E.

Discussion

68.	/_For a reacation, X ‚Äö√ú√≠ Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is?
A.	0
B.	1
C.	2
D.	3
Answer» D. 3

Discussion

69.	/_During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.?
A.	Enthalpy
B.	Gibbs free energy
C.	Internal energy
D.	Entropy
Answer» C. Internal energy

Discussion

70.	/_If 1.5 moles of oxygen combines with aluminium to form Al2O‚Äö√á√â, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.?
A.	27
B.	54
C.	5.4
D.	2.7
Answer» C. 5.4

Discussion

71.	/_If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its?
A.	Bubble point
B.	Saturation temperature
C.	Dew point
D.	Both B and C
Answer» E.

Discussion

72.	/_Normality of a solution does not change with the increase in the?
A.	Pressure
B.	Temperature
C.	Solute concentration
D.	Dilution of the solution
Answer» B. Temperature

Discussion

73.	/_A gas mixture contains 6 moles of H‚Äö√á√á and 2 moles of N‚Äö√á√á. If the total pressure of the gaseous mixture is 4 kgf/cm¬¨‚â§ ; then the partial pressure of N‚Äö√á√á in the mixture will be __________ kgf/cm¬¨‚â§ .?
A.	1
B.	2
C.	4
D.	8
Answer» B. 2

Discussion

74.	/_In a chemical process, the recycle stream is purged for?
A.	Increasing the product yield
B.	Enriching the product
C.	Limiting the inerts
D.	Heat conservation
Answer» D. Heat conservation

Discussion

75.	/_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.?
A.	Compressibility
B.	Molecular weight
C.	Humidity
D.	None of these
Answer» B. Molecular weight

Discussion

76.	/_The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be?
A.	Basic
B.	More acidic
C.	Neutral
D.	Of the same acidity
Answer» B. More acidic

Discussion

77.	/_Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because?
A.	The strong base and strong acid reacts completely
B.	The salt formed does not hydrolyse
C.	Only OH‚Äö√Ö¬™ and H‚Äö√Ö‚à´ ions react in every case
D.	The strong base and strong acid reacts in aqueous solution
Answer» D. The strong base and strong acid reacts in aqueous solution

Discussion

78.	/_Na‚Äö√á√áSO‚Äö√á√ë. 10H‚Äö√á√áO crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na‚Äö√á√áSO‚Äö√á√ë. The final concentration of the solute in the solution is 10%. The weight of crystals is?
A.	20
B.	32.2
C.	45.35
D.	58.65
Answer» E.

Discussion

79.	/_1 ata is equivalent to?
A.	1 atm
B.	10 torr
C.	0.98 Pascal
D.	1 kgf/cm¬¨‚â§
Answer» E.

Discussion

80.	/_Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5¬¨‚àûC).?
A.	¬¨‚àûAPI = 200(G - 1)
B.	¬¨‚àûAPI = (141.5/G) - 131.5
C.	¬¨‚àûAPI = (140/G) - 130
D.	¬¨‚àûAPI = 145 - (145/G)
Answer» C. ¬¨‚àûAPI = (140/G) - 130

Discussion

81.	/_The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is?
A.	Termed as relative saturation
B.	Not a function of the composition of gas mixture
C.	Called percentage saturation
D.	Not a function of the nature of vapor
Answer» B. Not a function of the composition of gas mixture

Discussion

82.	/_One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as?
A.	Brix = (400/G) - 400
B.	Brix = 200 (G-1)
C.	Brix = 145 - (145/G)
D.	None of these
Answer» B. Brix = 200 (G-1)

Discussion

83.	/_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.	3
B.	100
C.	1000
D.	None of these
Answer» D. None of these

Discussion

84.	/_¬¨‚àûAPI gravity of water at N.T.P. is about?
A.	0
B.	1
C.	10
D.	100
Answer» D. 100

Discussion

85.	/_One micron is equal to?
A.	10‚Äö√Ö¬™‚Äö√Ö¬• mm
B.	10‚Äö√Ö¬™‚Äö√Ö¬• cm
C.	10‚Äö√Ö¬™‚Äö√Ö‚àÇ m
D.	Both B & C
Answer» E.

Discussion

86.	/_Pick out the wrong conversion formula for the conversion of weight units :?
A.	1 tonne = 1000 kg = 22.046 lbs
B.	1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton
C.	1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons
D.	None of these
Answer» E.

Discussion

87.	/_The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.?
A.	Less than
B.	More than
C.	Equal to
D.	Either more or less; depends on the solvent
Answer» B. More than

Discussion

88.	/_Number of gm moles of solute dissolved in 1 kg of solvent is called its?
A.	Normality
B.	Molarity
C.	Molality
D.	Formality
Answer» D. Formality

Discussion

89.	/_For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.?
A.	Integral
B.	Differential
C.	Both A & B
D.	Neither A nor B
Answer» D. Neither A nor B

Discussion

90.	/_Pick out the correct conversion.?
A.	1 BTU =453.6 calories
B.	1 BTU = 252 calories
C.	1 calorie = 252 BTU
D.	1 calorie = 453.6 BTU
Answer» C. 1 calorie = 252 BTU

Discussion

91.	/_In the reaction, Ca + 2H‚Äö√á√áO = Ca(OH)‚Äö√á√á + H‚Äö√á√á ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)?
A.	4480
B.	2240
C.	1120
D.	0.4
Answer» B. 2240

Discussion

92.	/_The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the?
A.	Relative humidity
B.	Relative saturation
C.	Percentage saturation
D.	None of these
Answer» D. None of these

Discussion

93.	/_2 litres of nitrogen at N.T.P. weighs __________ gms.?
A.	14
B.	2.5
C.	28
D.	1.25
Answer» C. 28

Discussion

94.	/_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.??
A.	0.2
B.	0.1
C.	0.4
D.	0.6
Answer» E.

Discussion

95.	/_The boiling points for pure water and pure toluene are 100¬¨‚àûC and 110.6¬¨‚àûC 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?
A.	0 < Xw < 0.5
B.	Xw = 0.5
C.	0.5 < Xw < 1.0
D.	Xw = 1.0
Answer» D. Xw = 1.0

Discussion

96.	/_A bypass stream in a chemical process is useful, because it?
A.	Facilitates better control of the process
B.	Improves the conversion
C.	Increases the yield of products
D.	None of these
Answer» B. Improves the conversion

Discussion

97.	/_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¬¨‚àûC is approximately?
A.	0.07
B.	0.09
C.	0.11
D.	0.13
Answer» E.

Discussion

98.	/_The value of the gas-law constant 'R' is 1.987?
A.	Kcal/kg-mole.¬¨‚àûC
B.	Btu/lb-mole.¬¨‚àûR
C.	Kcal/kg-mole.¬¨‚àûK
D.	Both B & C
Answer» E.

Discussion

99.	/_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?
A.	Mixing
B.	Adsorption
C.	Wetting
D.	Complete wetting
Answer» E.

Discussion

100.	/_A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be?
A.	3 kmole/hr
B.	4 kmole/hr
C.	5 kmole/hr
D.	6 kmole/hr
Answer» D. 6 kmole/hr

Discussion

Explore topic-wise MCQs in Chemical Engineering.

*$_Degrees of freedom will be equal to the number of components for a system comprising of?

*$_Atoms of the same element, but of different masses are called?

*$_Boiling point of a non-homogeneous mixture of immiscible liquids is __________ that of any one of its separate components.?

*$_As per Kirchoff s equation, the heat of reaction is affected by the?

*$_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.?

*$_For the gaseous phase reaction, N‚Äö√á√á + O‚Äö√á√á ‚Äö√°√£ 2NO, ≈í√ÆH = + 80 kJ/kg. mole; the decomposition of NO is favoured by?

*$_The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.?

*$_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?

*$_1 Kcal/kg. ¬¨‚àûC is equivalent to __________ BTU/lb. ¬¨‚àûF.?

*/*_Vapor pressure of a solution is proportional to(where, Sv and St are mole fraction of solvent and solute respectively).?

*/*_Unit of mass velocity is?

*/*_1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is?

*/*_Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0¬¨‚àûC will be __________ atmosphere.?

*/*_Roult's law is obeyed by a __________ solution.?

*/*_Gases having same reduced temperatures and reduced pressures?

*/*_The osmotic pressure of a solution increases, if its __________ is decreased.?

*/*_The crystallisation of a solute from a solution may be done by?

*/*_For a reacation, X ‚Äö√ú√≠ Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is?

*/*_During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.?

*/*_If 1.5 moles of oxygen combines with aluminium to form Al2O‚Äö√á√â, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.?

*/*_If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its?

*/*_Normality of a solution does not change with the increase in the?

*/*_A gas mixture contains 6 moles of H‚Äö√á√á and 2 moles of N‚Äö√á√á. If the total pressure of the gaseous mixture is 4 kgf/cm¬¨‚â§ ; then the partial pressure of N‚Äö√á√á in the mixture will be __________ kgf/cm¬¨‚â§ .?

*/*_In a chemical process, the recycle stream is purged for?

*/*_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.?

*/*_The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be?

*/*_Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because?

*/*_Na‚Äö√á√áSO‚Äö√á√ë. 10H‚Äö√á√áO crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na‚Äö√á√áSO‚Äö√á√ë. The final concentration of the solute in the solution is 10%. The weight of crystals is?

*/*_1 ata is equivalent to?

*/*_Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5¬¨‚àûC).?

*/*_The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is?

*/*_One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as?

*/*_A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of?

*/*_¬¨‚àûAPI gravity of water at N.T.P. is about?

*/*_One micron is equal to?

*/*_Pick out the wrong conversion formula for the conversion of weight units :?

*/*_The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.?

*/*_Number of gm moles of solute dissolved in 1 kg of solvent is called its?

*/*_For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.?

*/*_Pick out the correct conversion.?

*/*_In the reaction, Ca + 2H‚Äö√á√áO = Ca(OH)‚Äö√á√á + H‚Äö√á√á ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)?

*/*_The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the?

*/*_2 litres of nitrogen at N.T.P. weighs __________ gms.?

*/*_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.??

*/*_A bypass stream in a chemical process is useful, because it?

*/*_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¬¨‚àûC is approximately?

*/*_The value of the gas-law constant 'R' is 1.987?

*/*_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?

*/*_A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be?

/_Vapor pressure of a solution is proportional to(where, Sv and St are mole fraction of solvent and solute respectively).?

/_Unit of mass velocity is?

/_1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is?

/_Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0¬¨‚àûC will be __________ atmosphere.?

/_Roult's law is obeyed by a __________ solution.?

/_Gases having same reduced temperatures and reduced pressures?

/_The osmotic pressure of a solution increases, if its __________ is decreased.?

/_The crystallisation of a solute from a solution may be done by?

/_For a reacation, X ‚Äö√ú√≠ Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is?

/_During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.?

/_If 1.5 moles of oxygen combines with aluminium to form Al2O‚Äö√á√â, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.?

/_If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its?

/_Normality of a solution does not change with the increase in the?

/_A gas mixture contains 6 moles of H‚Äö√á√á and 2 moles of N‚Äö√á√á. If the total pressure of the gaseous mixture is 4 kgf/cm¬¨‚â§ ; then the partial pressure of N‚Äö√á√á in the mixture will be __________ kgf/cm¬¨‚â§ .?

/_In a chemical process, the recycle stream is purged for?

/_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.?

/_The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be?

/_Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because?

/_Na‚Äö√á√áSO‚Äö√á√ë. 10H‚Äö√á√áO crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na‚Äö√á√áSO‚Äö√á√ë. The final concentration of the solute in the solution is 10%. The weight of crystals is?

/_1 ata is equivalent to?

/_Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5¬¨‚àûC).?

/_The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is?

/_One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as?

/_A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of?

/_¬¨‚àûAPI gravity of water at N.T.P. is about?

/_One micron is equal to?

/_Pick out the wrong conversion formula for the conversion of weight units :?

/_The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.?

/_Number of gm moles of solute dissolved in 1 kg of solvent is called its?

/_For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.?

/_Pick out the correct conversion.?

/_In the reaction, Ca + 2H‚Äö√á√áO = Ca(OH)‚Äö√á√á + H‚Äö√á√á ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)?

/_The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the?

/_2 litres of nitrogen at N.T.P. weighs __________ gms.?

/_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.??

/_A bypass stream in a chemical process is useful, because it?

/_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¬¨‚àûC is approximately?

/_The value of the gas-law constant 'R' is 1.987?

/_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?

/_A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be?