1. All hydrolysis reactions (ester hydrolysis, halogenated hydrocarbon hydrolysis, peptide bond hydrolysis, polysaccharide hydrolysis, oil hydrolysis)

2. Esterification reaction, reaction of generating ether, reaction of alcohol and concentrated halogen acid.

3. Nitration and sulfonation of benzene, reaction of phenol with bromine water.

4. Halogen substitution under illumination

If analyzed from universities, there are three kinds of substitution reactions-free radical substitution, electrophilic substitution and nucleophilic substitution.

(1) radical substitution, only 1 species, that is, alkanes are replaced by halogen elements and H atoms are replaced by halogen atoms under illumination.

(2) electrophilic substitution, mainly on benzene ring, including nitration, sulfonation and Friedel-Crafts reaction (Friedel-Crafts acylation and Friedel-Crafts alkylation) on benzene ring.

(3) nucleophilic substitution, mainly two kinds of organic compounds, halogenated hydrocarbons and alcohols.

Hydrolysis of halogenated hydrocarbons, that is, halogenated hydrocarbons are replaced by OH- attack to obtain alcohols, and can also be replaced by CN- attack to generate nitriles; Alcohol reacts with HX, and the alcohol is attacked by X-, replacing the original hydroxyl OH to obtain halogenated hydrocarbons.

I hope this helps.