Hydrogen and oxygen react to form water. Which type of reaction is this?
Answer and explanation
Correct answer: Combination reaction
The balanced equation is 2H₂ + O₂ → 2H₂O. Two reactants, hydrogen and oxygen, combine to produce only one compound, water; this satisfies the definition of a combination reaction. A decomposition reaction starts with one compound and gives multiple products. Displacement reactions involve replacement, while double displacement exchanges ions between two compounds.
Frequently asked questions
What is the correct answer to this question?
Combination reaction
Why is this the correct answer?
The balanced equation is 2H₂ + O₂ → 2H₂O. Two reactants, hydrogen and oxygen, combine to produce only one compound, water; this satisfies the definition of a combination reaction. A decomposition reaction starts with one compound and gives multiple products. Displacement reactions involve replacement, while double displacement exchanges ions between two compounds.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
