Question

Aluminum can react with oxygen gas to produce aluminium oxide. What type of reaction is this?

Answer 1

Hint: We know that the aluminum oxide is a chemical compound of aluminum and oxygen, also known as alumina or aloxide. Aluminium has a $$+3$$ charge and oxygen has a $$-2$$ charge in it also, it is a white amorphous material that is odorless.

Complete answer:
As we know that Aluminium oxide is an amphoteric oxide with a chemical formula $$A{l}_2{O}_3$$ that has a huge variety of uses in various fields. Aluminium oxide is amphoteric in nature. Amphoteric oxides can be defined as metal oxides that react with both acids as well as bases to produce salts and water.
The stoichiometric coefficient of a reactant is equal to that of the product. as we can see here that there are $$1$$ and $$4$$ aluminium atoms present on each side. so, we will change the coefficient of the aluminium present on the reactant side to $$4.$$ Thus, when aluminum reacts with oxygen gas it produces aluminium oxide, and the following chemical reaction is given by: $4Al+3O_2\to 2A{l}_2{O}_3.$ This reaction is also known as synthesis reaction since there are two reactants which are aluminium and oxygen gas which on combining forms one product which is aluminium oxide. Synthesis reactions come in a variety of forms. Nucleophilic and electrophilic addition and substitution reactions.
And hence synthesis reaction is the correct answer.

Note:
Remember that the complex molecule's synthesis can entail many individual reactions that proceed in order from available starting materials to the desired product. In most cases, each step only requires a reaction at one chemical bond in the molecule.