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The electrolysis of water has the equation 2H2O (l) → 2H2 (g) + O2 (g). What type of reaction is this?

Question 9 options:

A)

Single displacement

B)

Double displacement

C)

Decomposition

D)

Synthesis

2 Answers

3 votes

Answer:

Decomposition

Step-by-step explanation:

User Greg Kramida
by
8.9k points
3 votes

Answer: The correct option is C) decomposition

Step-by-step explanation:

Single displacement reaction is defined as the reaction where a more reactive element displaces a less reactive element from its salt solution.


AX+B\rightarrow BX+A

Element B is more reactive than element A

Double displacement reaction is defined as the reaction where an exchange of ions takes place in a solution


AX+BY\rightarrow AY+BX

Decomposition reaction is defined as the reaction where a single large chemical species breaks down into two or more smaller chemical species.


AB\rightarrow A+B

Synthesis reaction is defined as the reaction where two or more smaller chemical species combine together in their elemental state to form a single large chemical species.


A+B\rightarrow AB

For the given chemical reaction:


2H_2O(l)\rightarrow 2H_2(g)+O_2(g)

Here, water is breaking down into two smaller species of oxygen and hydrogen gas. Thus, it is a decomposition reaction.

Hence, the correct option is C) decomposition

User Wellbin Huang
by
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