Question

Which among the following are physical or chemical changes?
(a) Evaporation of petrol
(b) Burning of Liquefied Petroleum Gas (LPG)
(c) Heating of an iron rod to red hot.
(d) Curdling of milk
(e) Sublimation of solid ammonium chloride

NCERT Class X
Science - Exemplar Problems

Chapter_Chemical Reactions And Equations

Answer 1

(a), (c), (e) are physical changes.
(b), (d) are chemical changes.

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