# Separation Processes Questions and Answers – Ion-Exchange Cycle

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This set of Separation Processes Multiple Choice Questions & Answers (MCQs) focuses on “Ion-Exchange Cycle”.

1. What is the dominant use of ion exchange?
a) Water softening with gel resins
b) Separation of metals
c) Metallurgy
d) Extraction of metals

Explanation: The dominant use of ion exchange is water softening with gel resins.

2. If the interstitial velocity is 40 and the length is 40 units what is the time required for displacement?(assume SI units)
a) 1
b) 2
c) 3
d) 4

Explanation: T= L/U hence, time = 40/40=1.

3. If the interstitial velocity is 40 and the length is 80 units what is the time required for displacement?(assume SI units)
a) 1
b) 2
c) 3
d) 4

Explanation: T= L/U hence, time = 80/40=2.

4. If the interstitial velocity is 50 and the length is 60 units what is the time required for displacement?(assume SI units)
a) 1.5
b) 1.2
c) 6.5
d) 4.4

Explanation: T= L/U hence, time = 60/50=1.2.

5. If the interstitial velocity is 80 and the length is 20 units what is the time required for displacement?(assume SI units)
a) 0.25
b) 2
c) 3.5
d) 15

Explanation: T= L/U hence, time = 20/80=0.25.

6. If the interstitial velocity is 60 and the length is 80 units what is the time required for displacement?(assume SI units)
a) 1.7
b) 2.6
c) 1.33
d) 5.5

Explanation: T= L/U hence, time = 80/60=1.33.

7. If the interstitial velocity is 90 and the length is 40 units what is the time required for displacement?(assume SI units)
a) 1.33
b) 2.25
c) 7.6
d) 4.5

Explanation: T= L/U hence, time = 90/40=2.25.

8. If the interstitial velocity is 20 and the length is 40 units what is the time required for displacement?(assume SI units)
a) 1
b) 2
c) 3
d) 4

Explanation: T= L/U hence, time = 40/20=2.

9. If the interstitial velocity is 10 and the length is 40 units what is the time required for displacement?(assume SI units)
a) 1
b) 2
c) 3
d) 4

Explanation: T= L/U hence, time = 40/10=4.

10. If the interstitial velocity is 50 and the length is 40 units what is the time required for displacement?(assume SI units)
a) 0.5
b) 0.6
c) 0.8
d) 0.6 