250+ TOP MCQs on Schmidt Number and Answers

Mass Transfer Multiple Choice Questions on “Schmidt Number”.

1. What is the value of the Schmidt number for ammonia?
a) 0.78
b) 0.79
c) 0.81
d) 0.82
Answer: a
Clarification: Ammonia also known as Azane is a colorless gas with a characteristic pungent smell. It is also used in many commercial cleaning products.

2. What is the value of the Schmidt number for carbon-dioxide?
a) 0.92
b) 0.93
c) 0.94
d) 0.95
Answer: c
Clarification: It is a colorless, odorless gas vital to life on earth. This naturally occurring chemical compound is composed of a carbon atom covalently double bonded to two oxygen atoms.

3. What is the dimension of the Schmidt number?
a) Newton
b) Meter
c) Celsius
d) It is a dimensional quantity
Answer: d
Clarification: Schmidt number = v/D and it has no dimensions.

4. Which one of the following is having the lowest value of Schmidt number?
a) Oxygen
b) Water
c) Benzene
d) Ethyl alcohol
Answer: b
Clarification: Schmidt number of water is 0.60 while that of oxygen, ethyl alcohol and benzene are 0.75, 1.76 and 1.30 respectively.

5. What is the value of the Schmidt number for water?
a) 0.62
b) 0.61
c) 0.60
d) 0.59
Answer: c
Clarification: Water is a transparent fluid and its molecules are connected by covalent bonds. It is tasteless and odorless.

6. Schmidt number is given by the formula
a) 2 D/v
b) v/D
c) D/v
d) 2 v/D
Answer: b
Clarification: Schmidt number is defined as the ratio of viscosity and mass diffusivity and is used to characterize fluid flows in which there are simultaneous momentum and mass diffusion convection processes.

7. Which one of the following is having the highest value of Schmidt number?
a) Benzene
b) Carbon dioxide
c) Acetic acid
d) Ammonia
Answer: a
Clarification: Schmidt number of benzene is 1.78 while that of carbon dioxide, acetic acid and ammonia are 0.78, 1.16 and 0.78 respectively.

8. What is the value of the Schmidt number for acetic acid?
a) 4.16
b) 3.16
c) 2.16
d) 1.16
Answer: d
Clarification: It is a colorless liquid and weak acid. It is an important chemical reagent.

9. What is the value of the Schmidt number for benzene?
a) 1.96
b) 1.86
c) 1.76
d) 1.66
Answer: c
Clarification: Its molecule is composed of six carbon atoms joined in a ring with one hydrogen atom attached to each carbon atom.

10. Schmidt number is given by
a) German engineer
b) British engineer
c) French engineer
d) American engineer
Answer: a
Clarification: It was named after the German engineer Ernst Heinrich Wilhelm Schmidt.