Question

Which of the following materials is not used as a releasing agent?

• A. Liquid Detergent
• B. Oil
• C. Liquid Wax
• D. Alum

Hint:

A good rule of thumb for identifying release agents is to think of common slippery or non-stick substances. Alum does not share these properties and has different industrial and chemical uses.

Answer 1

The Correct Option is D

Step 1: Define a releasing agent. A releasing agent (or mold release) is a substance applied to a mold surface to prevent the casting material from sticking to it, thereby facilitating easy removal.
Step 2: Analyze the options. Liquid detergent, oils, and waxes are all common substances used to create a non-stick barrier. Alum (potassium aluminum sulfate) is a chemical compound used in various processes like water purification and as a mordant in dyeing, but it is not used as a mold release agent.