During the electrolysis of water, hydrogen and oxygen are released in which ratio?
2:1
Electrolysis of water splits water into its constituent gases according to the reaction \(2H_2O \rightarrow 2H_2 + O_2\).
From the balanced equation, 2 volumes of hydrogen gas are liberated at the cathode for every 1 volume of oxygen gas liberated at the anode.
Therefore, the volume ratio of hydrogen to oxygen released is \(2:1\).
This 2:1 ratio also reflects the composition of the water molecule, which contains two hydrogen atoms for every one oxygen atom.
Hence, hydrogen and oxygen are released in the ratio 2:1.
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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?
