Consider the following reaction:

Question

2H₂O (l) → 2H₂ (g) + O₂ (g)
Which of the following statements is/are true for this reaction?
(1 point)
This is a combustion reaction.
This is a decomposition reaction.
None of the above
This is a synthesis reaction.

Answer 1

The reaction you provided is:

\[ 2H₂O (l) → 2H₂ (g) + O₂ (g) \]

Let's analyze the statements one by one:

1. This is a combustion reaction.
   False. A combustion reaction typically involves a substance reacting with oxygen (usually a hydrocarbon or another fuel) to produce heat and light, resulting in products like CO₂ and H₂O. This reaction does not fit that definition.

2. This is a decomposition reaction.
   True. A decomposition reaction occurs when a single compound breaks down into two or more simpler substances. Here, water (H₂O) is breaking down into hydrogen (H₂) and oxygen (O₂).

3. None of the above.
   False. Since one of the statements (the decomposition reaction) is true, this statement is not correct.

4. This is a synthesis reaction.
   False. A synthesis reaction involves two or more substances combining to form a single product. This reaction is the opposite, as it involves a single compound (water) breaking down into multiple products.

Based on this assessment, the only true statement regarding the reaction is that this is a decomposition reaction.