Question

Which of the following is not a property of good sand?

(a) Good sand should be chemically inert

(b) It should be clean

(c) It should not contain any organic matter

(d) It must contain salts that can attract moisture from the atmosphere

The question was posed to me during a job interview.

My enquiry is from Mortar topic in portion Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

Answer 1

The correct answer is (d) It must contain salts that can attract moisture from the atmosphere

For explanation I would say: Good sand should not contain salts that can attract moisture from the atmosphere and should be chemically inert. It should be clean and should not contain any organic matter.