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Grade: 12

                        

Which one of the following is not a chemical change? A Sublimation B Combustion C Electrolysis D Rusting

28 days ago

Answers : (1)

Adarsh Pal
askIITians Faculty
159 Points
							

Sublimation is a process in which the substance's phase transition occurs directly from solid to the gaseous phase. Hence, its a physical change not chemical.
Combustion is basically the reaction of the compound with oxygen, which is a chemical reaction, hence the chemical change.
Electrolysis is the process of chemical decomposition of a substance through passing electric current.
Rusting is a process involving the reaction of metals with moisture (air + water). Thus, it is a chemical change.
Hence, the answer is option A

28 days ago
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