20 Question 6 When naming aldehydes, the aldehyde group is at position number 1. O True O False
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Step 1: The aldehyde group is always at the end of the carbon chain. Show more…
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Shalini T.
Answer true or false. (a) A functional group is a group of atoms in an organic molecule that undergoes a predictable set of chemical reactions. (b) The functional group of an alcohol, an aldehyde, and a ketone have in common the fact that each contains a single oxygen atom. (c) A primary alcohol has one - OH group, a secondary alcohol has two $-\mathrm{OH}$ groups, and a tertiary alcohol has three $-$ OH groups. (d) There are two alcohols with the molecular formula $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}$. (e) There are three amines with the molecular formula $\mathrm{C}_{3} \mathrm{H}_{9} \mathrm{N}$. (f) Aldehydes, ketones, carboxylic acids, and esters all contain a carbonyl group. (g) A compound with the molecular formula of $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}$ may be either an aldehyde, a ketone, or a carboxylic acid. (h) Bond angles about the carbonyl carbon of an aldehyde, a ketone, a carboxylic acid, and an ester are all approximately $109.5^{\circ}$. (i) The molecular formula of the smallest aldehyde is $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O},$ and that of the smallest ketone is also $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}$. (j) The molecular formula of the smallest carboxylic acid is $\mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}_{2}$.
True or false? Aldehydes are characterized by the presence of the -COH group (where carbon is double bonded to the oxygen atom and single bonded to the hydrogen).
Krishna G.
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