What is the structural formula for propanol?

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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

What is the structural formula for propanol?

Explanation:
Propanol is an alcohol with three carbon atoms in a row and a hydroxyl group attached to the end. The structural formula should show that connectivity clearly. CH3-CH2-CH2-OH does exactly that: a three-carbon chain with the OH on the terminal carbon, which is propan-1-ol. Writing it as CH3CH2CH2OH conveys the same structure, just without the hyphens, so it’s the same correct representation. CH3CH2OH refers to ethanol (two carbons), not propanol. C3H7OH gives the same composition but doesn’t show how the atoms are connected, so it isn’t a structural formula.

Propanol is an alcohol with three carbon atoms in a row and a hydroxyl group attached to the end. The structural formula should show that connectivity clearly. CH3-CH2-CH2-OH does exactly that: a three-carbon chain with the OH on the terminal carbon, which is propan-1-ol. Writing it as CH3CH2CH2OH conveys the same structure, just without the hyphens, so it’s the same correct representation. CH3CH2OH refers to ethanol (two carbons), not propanol. C3H7OH gives the same composition but doesn’t show how the atoms are connected, so it isn’t a structural formula.

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