human
Identify the type of reactions and provide a brief explanation for each of the given reactions: a. 2 Mg(s)+O2(g)→2 MgO(s), b. 2 HBr(aq)+Ca(OH)2(aq)→2 H2O(l)+CaBr2(aq), c. Ca(s)+Cl2(g)→CaCl2(s), d. Zn(s)+Fe2+(aq)→Zn2+(aq)+Fe(s).
gpt
a. redox reaction, b. acid-base reaction, c. redox reaction, d. redox reaction.
Explanation: Reactions a, c, and d involve the transfer of electrons, making them redox reactions, while reaction b is an acid-base reaction as it involves the transfer of hydrogen ions.