which of the following can be termed as a chemical change?1nd option is cement hardens when exposed to air,2nd option water vapour condenses as rain,3nd option is A car run when powered by petrol, 4nd option chocalate melts when left outside during summer.
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Answered by
1
Answer:
1st option , as well as 3rd option .
Answered by
3
Answer:
3rd Option
Explanation:
It is because the car burns petrol to create chemical energy, and it changes the chemical composition of it entirely. 1st, 2nd, and 4th options are physical changes because they only involve the change in state of matter.
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