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) Curding of milk
(e) Sublimation of solid ammonium chloride
Solution:
(a) Physical
(b) Chemical
(c) Physical
(d) Chemical
(e) Physical.
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