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Which among the following are physical or chemical changes? i. Evaporation of petrol

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asked Feb 7, 2018 in Chemistry by sforrest072 (157,439 points) ● 61 ● 410 ● 942

Which among the following are physical or chemical changes?
i. Evaporation of petrol
ii. Burning of Liquefied Petroleum Gas (LPG)
iii. Heating of an iron rod to red hot
iv. Curdling of milk
v. Sublimation of solid ammonium chloride

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answered Feb 7, 2018 by mdsamim (213,225 points) ● 5 ● 10 ● 15
selected Feb 7, 2018 by sforrest072
 
Best answer

Physical changes: Evaporation of petrol, heating of an iron rod to red hot, sublimation of solid ammonium chloride.
Chemical changes: Burning of Liquefied Petroleum Gas (LPG), curdling of milk.

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