Question

A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?

Answer 1

No, the changes which have occurred in the cement couldn't be reversed. When sunlight

falls on the wet cement, chemical changes occur which is an irreversible process.(the process through which we cannot the previous original version of thing )

Answer 2

Answer:

• Cement is the used for the construction work is packed in the sack.

• When needed the cement is mixed with the water as the cement used as the concrete.
• The wet cement when left unused or the cement sack is left open.
• The cement forms into a hard solid block, which cannot be used further.
• This solidification happens only through the process of hydration.
• The moisture from the atmosphere is absorbed by the cement and thereby it solidifies and the cement cannot be reversed back.