Which option shows the displayed formula for ethene?

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Prepare for the IGCSE Organic Chemistry Exam. Study with flashcards and multiple choice questions, each question has hints and explanations to ensure you understand the core concepts. Get ready for your test with confidence!

Multiple Choice

Which option shows the displayed formula for ethene?

Explanation:
Ethene is the simplest alkene, so its displayed formula must show a C=C double bond between two carbon atoms with two hydrogens on each carbon. That gives CH2=CH2 (or H2C=CH2): two carbons linked by a double bond, four hydrogens total, and no additional carbon atoms beyond those two. This is what differentiates it from the other shown possibilities, which would have more carbon atoms or a different bonding pattern. So the correct formula is the one that clearly shows two carbons with a double bond and four hydrogens, i.e., CH2=CH2.

Ethene is the simplest alkene, so its displayed formula must show a C=C double bond between two carbon atoms with two hydrogens on each carbon. That gives CH2=CH2 (or H2C=CH2): two carbons linked by a double bond, four hydrogens total, and no additional carbon atoms beyond those two. This is what differentiates it from the other shown possibilities, which would have more carbon atoms or a different bonding pattern. So the correct formula is the one that clearly shows two carbons with a double bond and four hydrogens, i.e., CH2=CH2.

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