Question
CuO + H2 → Cu + H2O This equation is an example of:
The correct answer is Redox
The correct answer is Redox.
Key Points
- Redox reactions involve changes in the oxidation state of the substrate.
- Loss of electrons or increase in oxidation state are both examples of oxidation.
- Gaining electrons or decreasing oxidation state are both considered reduction.
- In the reaction, CuO + H2 → Cu + H2O, Cu is reduced while hydrogen is oxidized.
- Redox reactions fall into one of two categories:
- Electron-transfer:
- During electron transfer, typically only one electron goes from the reducing agent to the oxidant.
- It is common to discuss such redox reactions in terms of redox couples and electrode potentials.
- Atomic transfer:
- Atomic transfer occurs when one substrate gives way to another.
Additional Information
- Oxidation:
- A molecule, atom, or ion undergoes oxidation as a result of a process when it loses electrons.
- Decomposition:
- The process of recycling nutrients consumed by an organism (plant or animal) to build its body begins with decomposition.
- Reduction:
- Reduction is the term used to describe that reaction in which a reactant gains electrons.
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Important Questions from Chemical Reaction
- Which one of the following is not an example of a redox reaction?
- Which one of the following is not a pigment?
- Which one of the following reactions is an example of decomposition reaction?
Match List I with List II and select the correct answer using the code given below the Lists:
LIST I
(Chemical process)
LIST II
(Reaction)
A.
Electrolysis of water
1.
Double displacement
reactionB.
Burning of coal
2.
Combination reaction
C.
Iron nail immersed in copper sulphate solution
3.
Decomposition reaction
D.
Addition of barium chloride solution to aluminium sulphate solution
4.
Displacement reaction
Consider the following reaction:
Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s)
Which of the following statements about the given reaction is NOT correct?
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