Structural formula for pentene?

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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

Structural formula for pentene?

Explanation:
Pentene is an alkene with five carbons and one C=C double bond, so the structure must show a double bond between two adjacent carbons. The correct arrangement is CH2=CH-CH2-CH2-CH3, where the first carbon has two hydrogens and the second carbon has one hydrogen because of the double bond, and the remaining three carbons form a single-bond chain. The other options depict all single bonds (pentane) or misplace hydrogens, so they do not show the required C=C.

Pentene is an alkene with five carbons and one C=C double bond, so the structure must show a double bond between two adjacent carbons. The correct arrangement is CH2=CH-CH2-CH2-CH3, where the first carbon has two hydrogens and the second carbon has one hydrogen because of the double bond, and the remaining three carbons form a single-bond chain. The other options depict all single bonds (pentane) or misplace hydrogens, so they do not show the required C=C.

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