Question

Arrange the following in the descending order of Contribution of fatty acid to saponification value:
A. C16:0
B. C4:0
C. C18:1
D. C10:0
Choose the correct answer from the options given below:

• A. B, D, A, C
• B. A, C, D, B
• C. C, B, D, A
• D. D, B, A, C

Hint:

Saponification value: higher for shorter chain fatty acids.
C4:0>C10:0>C16:0>C18:1.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Saponification value is inversely related to molecular weight.
Short-chain fatty acids contribute more to saponification value.
Step 2: Key Formula or Approach:
Saponification value \(\propto\) 1 / Molecular weight.
Step 3: Detailed Explanation:
Shorter chain fatty acids have higher saponification values.
B. C4:0 (butyric acid) - shortest chain, highest contribution.
D. C10:0 (capric acid) - next.
A. C16:0 (palmitic acid) - longer chain.
C. C18:1 (oleic acid) - longest chain, lowest contribution.
Thus, the descending order is B, D, A, C.
Step 4: Final Answer:
The correct order is B, D, A, C.
Hence, the correct option is (A). \bigskip