Question

Find the odd one out.

(a) Finely divided minerals

(b) Air entraining agents

(c) Synthetic derivatives

(d) Natural derivatives

This question was addressed to me during an interview.

My question is taken from Agents in chapter Admixtures and Construction Chemicals of Concrete Technology

Answer 1

The correct answer is:

(a) Finely divided minerals

The other options—air entraining agents, synthetic derivatives, and natural derivatives—are types of admixtures or chemicals used in concrete to modify its properties. Finely divided minerals, on the other hand, are typically not considered an admixture in the same context as the others, which specifically refer to substances used to modify the behavior or properties of concrete.