Topic content:
The following classification criteria are correct ()
A. Chemical reaction can be divided into oxidation-reduction reaction and non oxidation-reduction reaction (standard: gain or loss of oxygen)
B. Dispersion system is divided into solution, colloid and turbidity (standard: whether there is Tyndall effect)
C. Chemical reaction is divided into: combination reaction, decomposition reaction, replacement reaction and double decomposition reaction (standard: according to the types of reactants and products and the number of types of substances before and after reaction)
D. Oxides are divided into metal oxides and non-metal oxides (standard: whether metal elements are contained in oxides)
Best answer:
CD
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)