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In which molecule are all the atoms in the same plane? A - AQA - A-Level Chemistry - Question 15 - 2021 - Paper 3
Question 15
In which molecule are all the atoms in the same plane? A. CH₃CHO B. CH₃NH₂ C. C₃H₃Cl D. C₃H₈
Worked Solution & Example Answer:In which molecule are all the atoms in the same plane? A - AQA - A-Level Chemistry - Question 15 - 2021 - Paper 3
Step 1
C. C₃H₃Cl
Answer
The correct answer is C. C₃H₃Cl (propene)
Explanation
In C₃H₃Cl, the carbon atoms are bonded with sp² hybridization, which creates a planar structure due to the trigonal planar geometry around the doubly bonded carbon atom. This allows all atoms to reside in the same plane. In contrast, the other options have either tetrahedral or other geometries that do not maintain all atoms in a single plane.