Question

Match the columns.

Column A	Column B
1. A change which cannot be easily reversed	(a) man-made change
2. A change that repeats itself at regular intervals	(b) chemical change
3. A change that is made by humans	(c) physical change
4. A change in which the original substance cannot be obtained	(d) periodic change
5. A change where no new substance is formed	(e) irreversible change

Answer 1

Column A	Column B
1. A change which cannot be easily reversed	(e) irreversible change
2. A change that repeats itself at regular intervals	(d) periodic change
3. A change that is made by humans	(a) man-made change
4. A change in which the original substance cannot be obtained	(b) chemical change
5. A change where no new substance is formed	(c) physical change