Science, asked by anwin95, 9 months ago

which among the following are physical or chemical change
evaporation of petrol
burning of lpg
heating of iron rod to red hot
curding of milk
sublimation of solid ammonium chloride​

Answers

Answered by harshpandey2325
2

Answer:

evaporation of petrol is a physical change

burning of LPG is both a chemical change and a physical change because when LPG come out of the cylinder it changes into gas due to atmospheric pressure this is a physical change and the burning of LPG is chemical change

heating of iron rod to Red Hot is a chemical change

curding of milk is a chemical change

sublimation of solid Ammonium Chloride is a physical change

Answered by Megarox
2

Physical changes:

  • evaporation of petrol
  • heating of iron rod to red hot
  • burning of LPG

Chemical change:

  • curding of milk
  • sublimation of solid ammonium chloride
  • burning of LPG

Burning of LPG is both physical and chemical change as when the lpg comes out it is converted from a liquid state to gaseous state which is physical change.

When it burns in air that is chemical change

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