Question

Which is the correct proportion of oil, water, gum for preparation of primary emulsion using mineral oil

• A. 4:2:1
• B. 2:2:1
• C. 3:2:1
• D. 1:2:4

Hint:

For primary emulsions, a ratio of 3 parts oil, 2 parts water, and 1 part gum is commonly used.

Answer 1

The Correct Option is C

Step 1: Understanding the primary emulsion composition.
Primary emulsions are prepared using a mixture of oil, water, and gum. The gum acts as an emulsifying agent that stabilizes the emulsion. The proportions vary depending on the type of emulsion. For primary emulsions using mineral oil, the common ratio of oil, water, and gum is typically 3:2:1.
Step 2: Analyzing the options.
(A) 4:2:1: This ratio is not typical for a primary emulsion.
(B) 2:2:1: This is not the standard ratio for emulsions.
(C) 3:2:1: Correct — This is the most commonly used proportion for preparing primary emulsions, with the right balance of oil, water, and gum.
(D) 1:2:4: This is an incorrect ratio for primary emulsions.
Step 3: Conclusion.
The correct answer is (C) 3:2:1 as it is the standard ratio for the preparation of primary emulsions using mineral oil.