Question detail
During the cracking process, what type of reaction occurs?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Carbon compounds as fuels and feedstock
Question
- A. Synthesis reaction
- B. Decomposition reaction
- C. Combustion reaction
- D. Displacement reaction
Answer
Decomposition reaction
Explanation
Cracking is a decomposition reaction where larger hydrocarbon molecules are broken down into smaller molecules.
Common mistake
Incorrectly balancing catalytic cracking equations
Students often write the same number of carbon atoms on both sides of the equation but forget to balance the hydrogen atoms, leading to an unbalanced equation that still looks plausible.
Check that the total number of each element is equal on both sides of the equation. After balancing the carbon atoms, count the hydrogen atoms on each side and add the appropriate number of H₂ gas molecules (or other hydrogen-containing products) until the hydrogen atoms are also balanced. Verify the equation by ensuring the sum of the atomic counts for every element is identical on both sides.
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