Ravi appeared in class test where he wrote some statements, but he was confused to know the statements which were related to “Reversible changes”. Would you help him to choose out of the following?
a. Cowdung to biogas/
b. Making cheese from milk
c. Weathering of rocks
d. Folding of dress to pass through a waterlogged area
Answers
Answer:
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Explanation:
cow dung to biogas: Cow dung can be changed into Bio-gas but, Bio-gas cannot be changed again into Cow dung. Hence, the change is irreversible.
making cheese from milk: The curdling of milk is an irreversible change by which milk is converted to cottage cheese. It can be brought about by mixing a few drops of lemon juice with milk and boiling the mixture for a while.
weathering of rocks: it is an irreversible reaction because rock change into soil , soil never Change into rock.
folding of dress to pass through a waterlogged area: To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Yes, it can be reversed by unfolding the dress.
Answer:
D.
Explanation:
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