Which of the following combination reaction is an example of compound - element type combination reaction?CaO(s) + CO2(g) CaCO3(s)2H2(g) + O2(g) 2H2O(ℓ)CaO(s) + H2O(ℓ) Ca(OH)2(aq)2CO(g) + O2(g) 2CO2(g)
Question
Which of the following combination reaction is an example of compound - element type combination reaction?CaO(s) + CO2(g) CaCO3(s)2H2(g) + O2(g) 2H2O(ℓ)CaO(s) + H2O(ℓ) Ca(OH)2(aq)2CO(g) + O2(g) 2CO2(g)
Solution
The combination reaction that is an example of a compound - element type combination reaction is:
2H2(g) + O2(g) -> 2H2O(ℓ)
In this reaction, hydrogen (H2) and oxygen (O2), both elements, combine to form water (H2O), a compound. This is a classic example of a combination reaction where two or more elements combine to form a compound.
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