Question

Identify the type of reaction represented by each equation.

A: H2 + Cl2 → 2HCl

B: CH4 + 2O2 → CO2 + 2H2O

Equation A represents a____1___reaction, and equation B represents a___2___reaction.

Blank 1:
Combustion
Decomposition
Double displacement
Single displacement
Synthesis

Blank 2:
Combustion
Decomposition
Double displacement
Single displacement
Synthesis

Answer 1

1 - Synthesis

2 - Combustion

Chemical Reaction A is synthesis because both elements have synthesized into one, HCl.

Chemical Reaction B is combustion due to the fact that the products are carbon dioxide and water. A combustion reaction is a reaction that produces these products.

Hope this helps!

Answer 2

Answer: The correct answer is Synthesis and Combustion reaction.

Step-by-step explanation:

Combustion reaction is defined as the chemical reaction in which a hydrocarbon reacts with oxygen to produce carbon dioxide and water.

`\text{hydrocarbon}+O_2\rightarrow CO_2+H_2O`

Decomposition reaction is defined as the chemical reaction in which a single substance breaks down into two or more simpler substances.

`AB\rightarrow A+B`

Double displacement reaction is defined as the chemical reaction in which exchange of ions takes place.

`AB+CD\rightarrow AD+CB`

Single displacement reaction is defined as the chemical reaction in which more reactive element displaces a less reactive element from its chemical reaction.

`AB+C\rightarrow CB+A`

Synthesis reaction is defined as the chemical reaction in which substances combine in their elemental state to form a single compound.

`A+B\rightarrow AB`

• For A:
  `H_2+Cl_2\rightarrow 2HCl`

This reaction is considered as a synthesis reaction because hydrogen gas and chlorine gas are combining in their elemental states to produce hydrochloric acid molecule.

• For B:
  `CH_4+2O_2\rightarrow CO_2+2H_2O`

This reaction is considered as a combustion reaction because methane gas is reacting with oxygen gas to produce carbon dioxide gas and water molecule.

Thus, the correct answer is Synthesis and combustion reaction.