PDF chapter test TRY NOW
Give one example in each case.
(a) Change which occurs on mixing two substances but can be reversed.
(b) Change which occurs on mixing two substances but cannot be reversed.
(b) Change which occurs on mixing two substances but cannot be reversed.
Answer variants:
Formation of ice from water
Mixing of cement with water
Formation of salt solution
Heating of an iron rod
Baking of cake
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