Consider the following series of reactions - HSC - SSCE Chemistry - Question 18 - 2013 - Paper 1
Question 18
Consider the following series of reactions.
Petroleum fractions
→ Catalytic cracking
→ Compound X
→ Dilute sulfuric acid
→ Compound Y
→ Propanoic acid
→ Conce... show full transcript
Worked Solution & Example Answer:Consider the following series of reactions - HSC - SSCE Chemistry - Question 18 - 2013 - Paper 1
Step 1
Identify Compound X
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Answer
The reaction starts with petroleum fractions which undergo catalytic cracking to produce alkenes. The simplest alkene, ethylene, is likely to be Compound X.
Step 2
Identify Compound Y
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Answer
Compound Y is formed when Compound X (ethylene) reacts with dilute sulfuric acid. This reaction typically produces ethanol (a hydration reaction).
Step 3
Identify Compound Z
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Answer
The transformation involving Compound Y (ethanol) and concentrated sulfuric acid leads to the formation of an ester, specifically ethyl propanoate from the reaction of ethanol and propanoic acid.
Step 4
Conclusion and Final Selection
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Answer
Based on the identification of the compounds:
Compound X: Ethylene
Compound Y: Ethanol
Compound Z: Ethyl propanoate
The correct identification is option (D).
