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1. Al_(s) + OH^-_(aq) -----> Al(OH)₄^-_(aq) + H_2(g)                                               Generation of H2 from strong base and Al

2. PBr_3(l) + H₂O_(l) -----> H⁺ + Br^-_(aq) + H₃PO_3(aq)                                       Hydrolysis of phosphorous lalide

3. Ca_(s) + H⁺_(aq) -----> Ca²⁺_(aq) + H_2(g)                                                       Active metal and acid

4. Ba²⁺_(aq) + OH_(aq) + H⁺_(aq) + SO4^2-_(aq) -----> BaSO_4(s) + H₂O_(l)            Precipitation of insoluble sulfate

5. OH^-_(aq) + H₂PO₄^-_(aq) -----> H₂O_(l) + HPO₄^2-_(aq)                                    Acid-Base neutralization

6. SO_2(g) + MnO₄^-_(aq) + H⁺_(aq) -----> Mn²⁺_(aq) + SO₄^2-_(aq) + H₂O_(l)            Red-ox Reaction

7. H₂O_2(aq) + Cr₂O₇^2- + H⁺_(aq) -----> Cr³⁺ + O₂ + H₂O                             Red-ox Reaction

8. Cd(NH₃)₄²⁺_(aq) + H⁺_(aq) -----> Cd²⁺_(aq) + NH₄⁺_(aq)                               Acid-Base neutralization

9. CH₃CH=CH-CH₃ + HBr -----> CH₃-CH₂-CH-CH₃                              Addition of a hydrogen lalide to a double bond
                                                                            |
                                                                           Br

10. AgCl_(s) + NH_3(aq) -----> Ag(NH₃)₂⁺_(aq) + Cl^-_(aq)                                 Dissolution of precipitate by complex formation