Which one of the following is least likely to be a product of a redox reaction between sulfuric acid and zinc metal?
A - VCE - SSCE Chemistry - Question 9 - 2007 - Paper 1
Question 9
Which one of the following is least likely to be a product of a redox reaction between sulfuric acid and zinc metal?
A. H₂
B. H₂S
C. SO₂
D. SO₃
Worked Solution & Example Answer:Which one of the following is least likely to be a product of a redox reaction between sulfuric acid and zinc metal?
A - VCE - SSCE Chemistry - Question 9 - 2007 - Paper 1
Step 1
Identify the reaction products
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Answer
When zinc metal reacts with sulfuric acid, it typically produces hydrogen gas (H₂) and zinc sulfate (ZnSO₄). In some cases, sulfur compounds may also be formed.
Step 2
Evaluate each option
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Answer
A. H₂ is a common product of the reaction, thus likely to occur.
B. H₂S (hydrogen sulfide) can theoretically form under certain conditions, yet it is less common in this context.
C. SO₂ (sulfur dioxide) can form if the sulfur is reduced, making it possible but less probable in this reaction setup.
D. SO₃ (sulfur trioxide) is not formed in typical reactions with zinc metal and sulfuric acid, making it the least likely option.
Step 3
Conclude which is least likely
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Answer
Given the analysis, SO₃ is least likely to be a product of a redox reaction between sulfuric acid and zinc metal.
