Question

Methyl cellulose dissolves better in

• A. Cold water
• B. Hot water
• C. Soft paraffin
• D. Glycerin

Hint:

Always disperse methyl cellulose in hot water first, then add cold water to hydrate and dissolve it efficiently.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Cellulose derivatives have unique solubility characteristics depending on the substitution pattern.

Step 2: Detailed Explanation:
Methyl cellulose is a non-ionic water-soluble polymer.
It exhibits a property called inverse solubility, meaning it is more soluble in cold water and becomes insoluble or forms a gel when heated.
When added to hot water, it tends to agglomerate, making uniform dissolution difficult.

Step 3: Final Answer:
Methyl cellulose shows better solubility and hydration in cold water.