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The formation of water from oxygen and hydrogen is a _______ .
- a)Physical change
- b)Chemical change
- c)Reversible change
- d)Both Physical and Reversible change
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The formation of water from oxygen and hydrogen is a _______ .a)Physic...
Chemical Change:
When hydrogen and oxygen combine to form water, a new substance with different properties is formed. This is a chemical change.
Explanation:
Chemical change is a process in which one or more substances are changed into new substances with different physical and chemical properties. In the formation of water from hydrogen and oxygen, the hydrogen and oxygen molecules bond together to form a new molecule of water. This reaction is accompanied by the release of energy in the form of heat and light.
The chemical equation for the reaction is:
2H2 + O2 → 2H2O
Here, two molecules of hydrogen (H2) and one molecule of oxygen (O2) combine to form two molecules of water (H2O).
Reversible Change:
The formation of water from hydrogen and oxygen is not a reversible change. Once the reaction takes place, it is not possible to separate the water molecules back into hydrogen and oxygen.
Conclusion:
Hence, the correct option is B. Chemical change.
When hydrogen and oxygen combine to form water, a new substance with different properties is formed. This is a chemical change.
Explanation:
Chemical change is a process in which one or more substances are changed into new substances with different physical and chemical properties. In the formation of water from hydrogen and oxygen, the hydrogen and oxygen molecules bond together to form a new molecule of water. This reaction is accompanied by the release of energy in the form of heat and light.
The chemical equation for the reaction is:
2H2 + O2 → 2H2O
Here, two molecules of hydrogen (H2) and one molecule of oxygen (O2) combine to form two molecules of water (H2O).
Reversible Change:
The formation of water from hydrogen and oxygen is not a reversible change. Once the reaction takes place, it is not possible to separate the water molecules back into hydrogen and oxygen.
Conclusion:
Hence, the correct option is B. Chemical change.
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The formation of water from oxygen and hydrogen is a _______ .a)Physic...
A chemical reaction expresses a chemical change. For example, one chemical property of hydrogen is that it will react with oxygen to make water. We can write that as follows:
hydrogen reacts with oxygen to make water
We can represent this chemical change more succinctly as
hydrogen + oxygen → water
where the + sign means that the two substances interact chemically with each other and the → symbol implies that a chemical reaction takes place. But substances can also be represented by chemical formulas. Remembering that hydrogen and oxygen both exist as diatomic molecules, we can rewrite our chemical change as
H2 + O2 → H2O
This is an example of a chemical equation, which is a concise way of representing a chemical reaction. The initial substances are called reactants, and the final substances are called products.
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The formation of water from oxygen and hydrogen is a _______ .a)Physical changeb)Chemical changec)Reversible changed)Both Physical and Reversible changeCorrect answer is option 'B'. Can you explain this answer?
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