Which option shows the displayed formula for ethene?

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Study for the IGCSE Organic Chemistry Test. Engage with flashcards and multiple-choice questions, complete with hints and detailed explanations. Prepare effectively to excel in your exam!

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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