# Separation Processes Questions and Answers – Zone Melting

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This set of Separation Processes Multiple Choice Questions & Answers (MCQs) focuses on “Zone Melting”.

1. Calculate concentration of solvent if
Concentration of impurity is Wo=1%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 4.5*10-4
c) 16.6*10-3
d) 4.15*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 8.3*10-3.

2. Calculate concentration of solvent if
Concentration of impurity is Wo=2%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 4.5*10-4
c) 16.6*10-3
d) 4.15*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 16.6*10-3.

3. Calculate concentration of solvent if
Concentration of impurity is Wo=0.5%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 4.5*10-4
c) 16.6*10-3
d) 4.15*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 4.15*10-3.

4. Calculate concentration of solvent if
Concentration of impurity is Wo=0.6%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.5*10-3
b) 4.9*10-3
c) 32.6*10-3
d) 23*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 4.9*10-3.

5. Calculate concentration of solvent if
Concentration of impurity is Wo=0.7%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 7.8*10-4
c) 78*10-3
d) 5.8*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 5.8*10-3.

6. Calculate concentration of solvent if
Concentration of impurity is Wo=3%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 32.89*10-4
c) 16.6*10-3
d) 24.9*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 24.9*10-3.

7. Calculate concentration of solvent if
Concentration of impurity is Wo=0.8%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 79*10-4
c) 6.64*10-3
d) 7.9*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 6.64*10-3.

8. Calculate concentration of solvent if
Concentration of impurity is Wo=0.9%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 9.8*10-4
c) 7.47*10-3
d) 8*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 7.47*10-3.

9. Calculate concentration of solvent if
Concentration of impurity is Wo=0.4%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 3.32*10-4
c) 6.63*10-3
d) 4.15*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 3.32*10-3.

10. Calculate concentration of solvent if
Concentration of impurity is Wo=1.5%
Solid liquid equilibrium distribution coefficient is K=0.7
z/l= 0.8
a) 8.3*10-3
b) 4.5*10-4
c) 12.45*10-3
d) 9*10-3

Explanation: Since Ws= Wo(1-(1-K)exp(-K*z/l)), hence Ws= 12.45*10-3.

Sanfoundry Global Education & Learning Series – Separation Processes.

To practice all areas of Separation Processes, here is complete set of 1000+ Multiple Choice Questions and Answers. 