Question:
If coarse powder is having size 1, then very fine powder will have size:
If coarse powder is having size 1, then very fine powder will have size:
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Higher sieve numbers = Smaller openings = Finer powder.
Updated On: May 28, 2026
- $1/24$
- $1/200$
- $1/6$
- $1/90$
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The Correct Option is B
Solution and Explanation
Step 1: Concept
In pharmaceutical standards (like IP), powders are classified based on the sieve number through which they can pass.
Step 2: Meaning
Coarse powder passes through sieve no. 10 (or size 1 in relative terms), while very fine powder must pass through a much smaller mesh.
Step 3: Analysis
The classification is as follows: Coarse (10), Moderately Coarse (22), Moderately Fine (44), Fine (85), and Very Fine (120 or 200 depending on the specific pharmacopoeial definition). In this relative scale, 1/200 represents the smallest/finest grade.
Step 4: Conclusion
Based on standard powder grading, 1/200 represents the "very fine" category.
Final Answer: (B)
In pharmaceutical standards (like IP), powders are classified based on the sieve number through which they can pass.
Step 2: Meaning
Coarse powder passes through sieve no. 10 (or size 1 in relative terms), while very fine powder must pass through a much smaller mesh.
Step 3: Analysis
The classification is as follows: Coarse (10), Moderately Coarse (22), Moderately Fine (44), Fine (85), and Very Fine (120 or 200 depending on the specific pharmacopoeial definition). In this relative scale, 1/200 represents the smallest/finest grade.
Step 4: Conclusion
Based on standard powder grading, 1/200 represents the "very fine" category.
Final Answer: (B)
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