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The vapor pressures of benzene and toluene are 3 and $$\frac{4}{3}$$ atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is
A
0.4
B
0.6
C
0.8
D
0.2
Correct Answer:
0.6
In the hydrodealkylation of toluene to benzene, the following reactions occur:
C
7
H
8
+ H
2
→ C
6
H
6
+ CH
4
2C
6
H
6
⇋ C
12
H
10
+ H
2
Toluene and hydrogen are fed to a reactor in a molar ratio 1 : 5.80% of the toluene gets converted and the selectivity of benzene (defined as moles of benzene formed/moles of toluene converted) is 90%. The fractional conversion of hydrogen is
A
0.16
B
0.144
C
0.152
D
0.136
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is x
B
and the vapour pressures of benzene and water at these conditions are P
v
B
and P
v
w
respectively. The partial pressure of benzene in air-vapour mixture is
A
P<sub>v</sub><sup>B</sup>
B
X<sub>B</sub>.P<sub>v</sub><sup>B</sup>
C
(P<sub>atm</sub> - P<sub>v</sub><sup>w</sup>)x<sub>B</sub>
D
X<sub>B</sub>.P<sub>atm</sub>
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 1000 Moles of liquid in residue at end W= 500 Mole fraction in liquid at start X0 = 0.6 Mole fraction in liquid at end X= 0.5
A
0.2
B
0.3
C
0.4
D
0.5
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 800 Moles of liquid in residue at end W= 500 Mole fraction in liquid at start X0 = 0.5 Mole fraction in liquid at end X= 0.1
A
0.2
B
0.3
C
1
D
0.5
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 2000 Moles of liquid in residue at end W= 500 Mole fraction in liquid at start X0 = 0.3 Mole fraction in liquid at end X= 0.4
A
0.23
B
0.34
C
0.27
D
0.56
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 1000 Moles of liquid in residue at end W= 500 Mole fraction in liquid at start X0 = 0.5 Mole fraction in liquid at end X= 0.2
A
0.2
B
0.66
C
0.4
D
0.8
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 1000 Moles of liquid in residue at end W= 500 Mole fraction in liquid at start X0 = 0.25 Mole fraction in liquid at end X= 0.1
A
0.2
B
0.3
C
0.4
D
0.5
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 1000 Moles of liquid in residue at end W= 600 Mole fraction in liquid at start X0 = 0.6 Mole fraction in liquid at end X= 0.5
A
0.2
B
0.67
C
0.44
D
0.75
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 1000 Moles of liquid in residue at end W= 500 Mole fraction in liquid at start X0 = 0.7 Mole fraction in liquid at end X= 0.4
A
0.2
B
1
C
0.4
D
0.5
What is the mole fraction in instantaneous distillate if: Moles of liquid in residue at start W0= 1000 Moles of liquid in residue at end W= 300 Mole fraction in liquid at start X0 = 0.6 Mole fraction in liquid at end X= 0.5
A
0.26
B
0.61
C
0.64
D
0.59