Question

In order for compounds to be perceived by human olfactory system, the upper limit of molecular weight should be in the range of:

• A. 500-600 Da
• B. 400-450 Da
• C. 300 Da or less
• D. 700-800 Da

Hint:

Odorants: molecular weight ≤ 300 Da.
Higher molecular weight = less volatile.
Volatility is essential for olfaction.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The human olfactory system can detect volatile compounds.
Molecular weight affects volatility.

Step 2: Key Formula or Approach:
No specific formula.
Need to know the molecular weight limits for olfaction.

Step 3: Detailed Explanation:
For compounds to be perceived by the olfactory system,
the molecular weight should be 300 Da or less.
Higher molecular weight compounds are less volatile.
Thus, 300 Da or less is the upper limit.

Step 4: Final Answer:
The upper limit of molecular weight for olfaction is 300 Da or less.
Hence, the correct option is (C).