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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/m^{3} . The diffusivity of aniline in air is 0.74xl0^{5}m^{2}/s.The numerical value of mass transfer coefficient is 7.4 x 10^{3}. Its units are  
A.  m/s [Wrong Answer] 
B.  cm/s [Wrong Answer] 
C.  mole/m^{2}.s.Pa [Correct Answer] 
D.  kmole/m^{2}.s.Pa [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result 
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⇒ Number of gm moles of solute dissolved in one litre of a solution is called its
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⇒ Pick out the wrong unit conversion.
1 J = 1 W.Second = 10^{7} ergs = 9.5 x 10^{4} BTU = 0.2389 calorie
1 Watt = 746 hp


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⇒ If 1.5 moles of oxygen combines with aluminium to form Al_{2}O_{3}, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.
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⇒ For an endothermic reaction, the minimum value of energy of activation will be (where, ΔH = enthalpy of the reaction)
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⇒ Degrees of freedom will be equal to the number of components for a system comprising of
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⇒ One micron is equal to
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⇒ Number of gm moles of solute dissolved in one litre of a solution is called its
equivalent weight
molarity
molality
normality
⇒ Pick out the wrong unit conversion.
1 J = 1 W.Second = 10^{7} ergs = 9.5 x 10^{4} BTU = 0.2389 calorie
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⇒ 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 completely.
the salt formed does not hydrolyse.
only OH^{} and H^{+} ions react in every case.
the strong base and strong acid reacts in aqueous solution.
⇒ The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be
basic
more acidic
neutral
of the same acidity
⇒ The hydroxyl ion (OH^{}) concentration in a solution having pH value 3 will be
10^{11}
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⇒ If 1.5 moles of oxygen combines with aluminium to form Al_{2}O_{3}, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.
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⇒ For an endothermic reaction, the minimum value of energy of activation will be (where, ΔH = enthalpy of the reaction)
Δ H
>ΔH
<ΔH
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⇒ Degrees of freedom will be equal to the number of components for a system comprising of
only soluble liquid components.
partially miscible two liquid components system having two phases.
two liquid components and one solute (soluble in both the liquids).
none of these.
⇒ Increasing the temperature of an aqueous solution will cause decrease in its
molality
mole fraction
weight percent
molarity
⇒ NaOH contains __________ percent oxygen.
1
10
16
40
⇒ One micron is equal to
10^{4} mm
10^{4} cm
10^{6} m
both(b)&(c)
⇒ Roult's law is obeyed by a __________ solution.
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normal
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⇒ Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be __________ atmosphere.
0.5
1
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2
⇒ The reverse process of fractional crystallisation is called
stripping
leaching
differential distillation
absorption
⇒ The value of gas constant 'R' is __________ kcal/kg.mole.°C.
2.79
1.987
3.99
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⇒ The viscosity of water at room temperature may be around one
centipoise
poise
stoke
both (b) &(c)
⇒ An equation for calculating vapour pressure is given by, log_{10} P = A  B(t + c). This is called the
Kistyakowsky equation
Antonic equation
Kopp's rule
Trouton's rule
⇒ Gases diffuse faster compared to liquids because of the reason that the liquid molecules
are held together by stronger intermolecular forces.
move faster.
have no definite shape.
are heavier
⇒ Pick out the wrong unit conversion of calorific value.
1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg.
1 BTU/ft^{3} = 8.9 kcal/m^{3} = 0.038 MJ/m^{3}.
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⇒ 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
doubled.
halved.
trebled.
unpredictable.
⇒ The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
Trouton's rule
Kopp's rule
Antonie equation
Kistyakowsky equation
⇒ During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.
enthalpy
Gibbs free energy
internal energy
entropy
⇒ 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 m^{3}. 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 m^{3}. The amount of water vapour condensed (in kg) is
0
0.065
0.1
1
⇒ With rise in temperature, the solubility of ammonia in water at a fixed pressure
increases
decreases
remains unchanged
increases exponentially
⇒ The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the
nature of both the gas & the liquid.
temperature.
total pressure.
none of these.
⇒ In the reaction, represented by Na_{2}CO_{3} + HC1 → NaHO_{3} + NaCl, the equivalent weight of Na_{2}CO_{3} is
53
5.3
106
10.6
⇒ The value of (C_{p}  C_{v})for a real gas obeying Vander Wall's equation is
R
> R
< R
0.5 R
⇒ Boiling point of a solution as compared to that of the corresponding solvent is
less
more
same
either more or less; depends upon the solvent
⇒ 1 kg/m^{2} is equal to __________ mm water column.
1
10
100
1000
⇒ A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO_{2}, 0.05 gm mole of oxygen and 0.80 gm mole of N_{2}. What is its molecular weight ?
28.6
30
30.6
32.6