Question

Examine the equation.

2Ca + O2 → 2CaO

What is the best classification for the equation's reaction?

single displacement
decomposition
synthesis
double displacement

Answer 1

the answer is synthesis

Answer 2

Answer: Option (c) is the correct answer.

Step-by-step explanation:

A synthesis reaction is defined as a reaction in which two substances or atoms combine together to result in the formation of a compound.

For example,
`2Ca + O_(2) \rightarrow 2CaO`

Here, calcium and oxygen combine together to form compound calcium oxide.

Whereas in a decomposition reaction, a compound decomposes into two atoms.

A single displacement reaction is a reaction in which one element is displaced by another element.

For example,
`Zn + CuCl_(2) \rightarrow ZnCl_(2) + Cu`

A double displacement reaction is a reaction in which elements of two compounds interchange with each other forming two new compounds.

For example,
`Na_(2)S + 2HCl \rightarrow 2NaCl + HCl`

Hence, we can conclude that given reaction is a synthesis reaction.