Question 39
Chemistry and IndustryMortar is NOT used for under-water construction because
- A.it hardens by loss of water
- B.its hardening does not depend upon evaporation
- C.it requires concrete to harden
- D.it will be washed away by the flow of water.
Show the answer and explanation
Answer: A (it hardens by loss of water)
Explanation
Mortar sets as its water evaporates (and it absorbs CO2 from the air). Under water it cannot dry out, so it does not harden.