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Question:
[Gradpoint-Question AK-4] Which equation represents a combustion reaction?
A: Ca + 2H Cl —–> CaCl₂ + H₂
B: Pb(NO₃)₂ +2HCl —–> PbCl₂ + 2HNO₃
C: 2SO₂ + O₂ ——> 2SO₃
D: 2C₂H₆ + 7O₂ —–> 4CO₂ + 6H₂O
This question is worth 40 points. So please answer carefully. I’m bad at Chemical equations.
Answer:
The equation represents a combustion reaction is –
D: 2C₂H₆ + 7O₂ —–> 4CO₂ + 6H₂O
A reaction involves a substance reacting with oxygen and releasing energy in form of light or heat, such a chemical reaction is called a combustion reaction.
Burning coal, methane gas, and sparklers are all common examples of combustion reactions
2C₂H₆ + 7O₂ —–> 4CO₂ + 6H₂O
Here ethane reacts with oxygen and releases carbon dioxide and water with a high amount of energy.
Pb(NO₃)₂ +2HCl —–> PbCl₂ + 2HNO₃ is a double replacement, acid-base reaction. It is also called a neutralization reaction.
2SO₂ + O₂ ——> 2SO₃ is a combination reaction that is an example of an oxidation-reduction reaction.
Ca + 2H Cl —–> CaCl₂ + H₂ is a single replacement reaction that is also an example of oxidation-reduction reaction
Thus, the equation represents a combustion reaction is –
D: 2C₂H₆ + 7O₂ —–> 4CO₂ + 6H₂O
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