Topic content:
The following phenomenon is irrelevant to the redox reaction ()
A. Dense films are formed on the surface of aluminum
B. Combustion of fuel
C. The marble statue was corroded and destroyed by acid rain
D. Corrosion of steel
Best answer:
A. A dense film is formed on the surface of aluminum, and aluminum oxide is formed by the reaction of aluminum and oxygen. The valence of some elements rises and falls, which is related to the redox reaction, so A is not selected;
B. The combustion of fuel is redox reaction, such as the combustion of methane and hydrogen, which is related to redox reaction, so B is not selected;
C. The marble statue was corroded and destroyed by acid rain, and calcium carbonate reacted with hydrochloric acid to produce calcium chloride, water and carbon dioxide. There was no change in the valence, and it had nothing to do with the redox reaction, so C was selected;
D. Iron oxide is generated by the reaction of Fe, oxygen and water during the corrosion of steel. The valence of some elements rises and falls, which is related to the redox reaction, so D is not selected;
Therefore, C
Answer analysis:
There is no explanation for this question
Test core:
Essence of redox reaction: electron transfer (gain or loss or deviation) Characteristics of redox reaction: valence rise and fall (valence of some elements changes before and after reaction, which is the basis for judging redox reaction)