Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
Why do aldehydes undergo oxidation more readily than ketones?
aldehydes have a strongly acidic hydrogen attached to the carbonyl carbon
ketones have a weakly acidic hydrogen attached to the carbonyl carbon
aldehydes have a weakly acidic hydrogen attached to the carbonyl carbon
ketones have a strongly acidic hydrogen attached to the carbonyl carbon
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Which of the following products is formed when an aldehyde is reduced using a reducing agent like sodium borohydride (NaBH4)?
carboxylic acid
tertiary alcohol
primary alcohol
secondary alcohol
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Which of the following products is formed when a ketone is reduced using a reducing agent like sodium borohydride (NaBH4)?
carboxylic acid
tertiary alcohol
secondary alcohol
primary alcohol
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In the reduction of carbonyl compounds to alcohols, what role does the reducing agent play?
it provides electrons which act as nucleophiles
it provides hydroxide ions (OH-) which act as nucleophiles
it provides hydride ions (H-) which act as nucleophiles
it provides protons (H+) which act as electrophiles
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What type of reaction occurs when aldehydes and ketones react with hydrogen cyanide (HCN)?
electrophilic substitution
nucleophilic substitution
nucleophilic addition
electrophilic addition
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What are the products formed when aldehydes and ketones react with hydrogen cyanide (HCN)?
alcohols
esters
carboxylic acids
hydroxynitriles
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Hydroxynitriles contain which of the following substituents?
cyano (-CN) and hydroxy (-OH)
cyano (-CN) and carboxyl (-COOH)
hydroxy (-OH) and alkyl (-R)
hydroxy (-OH) and carboxyl (-COOH)
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Why is hydrogen cyanide often generated in situ when reacting with aldehydes and ketones?
hydrogen cyanide is toxic
hydrogen cyanide is unstable
hydrogen cyanide is expensive
hydrogen cyanide is insoluble in water
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What is the reason for the formation of a mixture of enantiomeric products when unsymmetrical ketones react with HCN?
the HCN molecule can only attack the planar carbonyl group from one side
the CN- nucleophile can only attack the planar carbonyl group from one side
the CN- nucleophile can attack the planar carbonyl group from either side
the HCN molecule can attack the planar carbonyl group from either side
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Which of the following reactions represents the oxidation of methanal to methanoic acid?
HCHO + 2[O] ➔ CH3OH
CHO + [O] ➔ COOH
HCHO + [O] ➔ HCOOH
CHO + 2[O] ➔ CH2OH
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Which of the following reactions represents the reduction of a ketone to a secondary alcohol?
CH3CHO + 2[H] ➔ CH3CH2OH
CH3COCH3 + [H] ➔ CH3CH2CHO
CH3COCH3 + 2[H] ➔ CH3CH(OH)CH3
HCHO + 2[H] ➔ CH3OH
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Which types of reactions tend to form racemic mixtures?
reactions occurring at linear functional groups
reactions occurring at planar functional groups
reactions occurring at trigonal pyramidal functional groups
reactions occurring at tetrahedral functional groups
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What would be the product of the reaction between propanone and acidified potassium cyanide?
a racemic mixture
a chiral product
a non-chiral product
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