questions 9,10, and 11 b. 2 d. 4 9 Which of the following has the highest boilin

Question

questions 9,10, and 11

b. 2 d. 4 9 Which of the following has the highest boiling point? a. hexane b. 1-pentanol c. pentanal d. butanoic acid Which of the following is a reactive intermediate in the base-catalyzed racemization of (R)-3-phenyl-2-butanone? a. carbanion b. enol c. Enolate ion d. radical 10. 11. Which of the following is the correct order of decreasing reactivity in hydrolysis reactions (more reactive > less reactive)? a. esters > amides> acid chlorides b. amides> acid chlorides> esters c. acid chlorides > esters > amides d. esters > acid chlorides > amides

Explanation / Answer

9. highest boiling is

D) butanoic acid

boiling point increase with increasing the length of hydrocarbon chain increases

carbons are added to a carboxylic acid, the boiling point increases. The main functional group in a carboxylic acid (COOH) leads to strong bonds to start off with. The functional group (COOH) comes from combines the forces of a carbonyl group.( polar covalent bond)

four intermolecular forces Ionic > Hydrogen bonding > dipole dipole > Van der Waals dispersion forces

10 b) enol

(R)-3-phenyl-butanone base catalysed to give carbanion then conveted into enol(b)

11 d)esters> acid chlorides > amides

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