NCERT Solutions for Class 6 Science Chapter 6
Important NCERT Questions
Class 6th Chapter 6 Changes Around Us
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 7
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?
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Due to water, cement hardens and its composition changes. Since it is a chemical change which cannot be reversed.
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