Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
False
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is A True The changes which can not be undone are the called permanent change. Cement when comes in contact with moisture it gets hardened. It cannot be converted back to the powdered cement again. Hence, it is a permanent change.