Question

Match List I with List II

	List I-Crystallizer-Unit operations		List II-Principle/Characteristics-Properties
A	Swenson‐walker crystallizer	I	Adiabatic evaporative cooling
B	Krystal crystallizer	II	Cooling alone
C	Vacuum crystallizer	III	Evaporation
D	Forced circulation type crystallizer	IV	Heat exchange, separation, circulation

Choose the correct answer from the options given below:

• A. A ‐I , B ‐II , C ‐IV , D ‐III
• B. A ‐III , B ‐I , C ‐IV , D ‐II
• C. A ‐I , B ‐IV , C ‐III , D ‐II
• D. A ‐II , B ‐III , C ‐I , D ‐IV

Answer 1

The Correct Option is D

To answer the question correctly, we need to match the crystallizers from List I with their corresponding principles or characteristics from List II.

1. Swenson‐walker crystallizer: This crystallizer works on the principle of cooling alone. Swenson-Walker crystallizers gradually cool the solution to facilitate crystal formation. Therefore, it matches with option II.
2. Krystal crystallizer: This crystallizer functions primarily through evaporation, making it suitable for handling solutions that require evaporative cooling to achieve crystallization. Thus, it corresponds with option III.
3. Vacuum crystallizer: It operates on the principle of adiabatic evaporative cooling. The use of a vacuum reduces the boiling point of the liquid, promoting crystallization through adiabatic cooling. This aligns with option I.
4. Forced circulation type crystallizer: This type of crystallizer involves processes like heat exchange, separation, and circulation to sustain the crystallization conditions efficiently. Therefore, it matches with option IV.

Thus, the correct assignment is:

• A - II
• B - III
• C - I
• D - IV

Therefore, the correct answer is: A ‐ II, B ‐ III, C ‐ I, D ‐ IV.