Biochem Q 1 & 2

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The arene or aromatic functional group is often represented as

A) a carbon-carbon triple bond.
B) a carbon-oxygen-hydrogen group.
C) a six-membered ring with three double bonds.
D) at least one double bond between carbon and oxygen.
E) one or more bonds between carbon and nitrogen.

The alkyne functional group is

A) a carbon-carbon triple bond.
B) a carbon-oxygen-hydrogen group.
C) a six-membered ring with three double bonds.
D) a double bond between carbon and oxygen.
E) one or more bonds between carbon and nitrogen

Two or more compounds with the same molecular formula but with the atoms connected differently are referred to as

A) normal alkanes.
B) branched alkanes.
C) functional groups.
D) constitutional isomers.
E) conformations.

What is the IUPAC name of the compound shown?
(CH3)3-C-CH2-CH2-CH3

A) 1,1,1-trimethylbutane
B) 2,2-dimethylpentane
C) 2-dimethylpentane
D) 2-ethylhexane
E) heptane

Which substance is not reactive with respect to alkanes?

A) H2
B) Cl2
C) O2
D) Br2
E) none of the above

When an alkane reacts with an element from group 7A, the reaction is referred to as

A) combustion.
B) decomposition.
C) displacement.
D) halogenation.
E) oxidation.

A correct name for the following compound is:

A) 1-bromo-3-ethyl-1-methyl cyclopropane
B) 1-bromo-2-ethyl-1-methyl cyclopropane
C) 1-bromo-1-ethyl-2-methyl cyclopropane
D) 2-bromo-1-ethyl-2-methyl cyclopropane
E) 1-bromo-3-ethyl-3-methyl cyclopropane

In organic chemistry, the term unsaturated means a molecule

A) which has the maximum number of carbon-hydrogen bonds possible.
B) with a specific six-membered ring structure.
C) which contains one or more multiple bonds between carbon atoms.
D) which can react by taking up one or more water molecules.
E) which is formed from many smaller molecules.

9) What is the IUPAC name of the compound shown?

A) trans-4,6-dimethyl-2-heptene
B) cis-4,6-dimethyl-2-heptene
C) trans-2-nonene
D) cis-2-nonene
E) trans-2,4-dimethyl-5-heptene

When an alkene undergoes hydrogenation, the product is an

A) alkane.
B) alkene.
C) alkyne.
D) aromatic.
E) alcohol.

The carbonyl group is

A) a general term for any functional group involving a carbon-oxygen bond.
B) found only in aldehydes and ketones.
C) a functional group in which carbon and oxygen are joined by a double bond.
D) a functional group with a 6-membered ring where at least one atom is oxygen.
E) produced by reduction reactions of primary or secondary alcohols.

The correct name for CH3CH(CH3)CH2CHO is

A) 2-methylbutanal.
B) 3-methyl-1-butanal.
C) 3-methylbutanal.
D) isopentanal.
E) 3-methyl-1-butanone.

Which compound has the highest boiling point?

A) CH3CHO
B) CH3CH2CHO
C) CH3CH2OH
D) CH3CH2CH2OH
E) CH3COCH3

The common name of an industrial solvent used in many manufacturing processes is methyl ethyl ketone. The correct systematic name and structural formula of this compound are

A) 2-propanone;
B) 2-butanone;
C) 3-butanone;
D) 3-butanone;
E) none of these

Oxidation of an aldehyde produces a

A) carboxylic acid.
B) primary alcohol.
C) secondary alcohol.
D) tertiary alcohol.
E) ketone.

What is the product of oxidation of butanal?

A) butane
B) 2-butanol
C) butanoic acid
D) 1-butanol
E) no reaction

What is the product of the oxidation of a ketone?

A) an alcohol
B) an aldehyde
C) a carboxylic acid
D) a hemiacetal
E) None, ketones don't oxidize.

Reduction of an aldehyde produces a

A) carboxylic acid.
B) primary alcohol.
C) secondary alcohol.
D) tertiary alcohol.
E) ketone.

What is the product of reduction of butanal?

A) butane
B) 2-butanol
C) butanoic acid
D) 1-butanol
E) no reaction

Which pair of compounds can react to form a hemiacetal?

A) CH3CH2CHO and CH3CH2OH
B) CH3COCH3 and CH3CH2CHO
C) CH3CH2CHO and CH3COOH
D) CH3COCH3 and CH3COOH
E) CH3COOH and CH3CH2OH

What are the defining characteristics of an acetal, and ether?

...

Which compound is a tertiary alcohol?

A) 1-propanol
B) 2-methyl-1-hexanol
C) 2-methyl-2-hexanol
D) 3-methyl-2-hexanol
E) 3-hexanol

Which compound is the least soluble in water?

A) CH3CH2CH2CH2OH
B) CH3CH2CH2OH
C) CH3CH2CH2CH3
D) CH3CH2CH3
E) CH3CH2CH2CH2CH2CH2CH2CH3

The product of dehydration of an alcohol is an

A) alkane.
B) alkene.
C) aromatic.
D) ether.
E) aldehyde.

Oxidation of R2CHOH will produce

A) an aldehyde.
B) a ketone.
C) an alkene.
D) a carboxylic acid.
E) no reaction.

The major product obtained from dehydration of 2-hexanol is

A) 1-hexene.
B) 2-hexene.
C) 3-hexene.
D) 2-hexanone.
E) 2-hexanal.

The most characteristic feature of thiols is ________

A) odor
B) solubility in water
C) reactivity with water
D) boiling point
E) color

Which of the following is not a property of aldehydes and ketones?

A) They are polar.
B) Most have distinctive odors.
C) They have lower boiling points than alcohols of similar molar mass.
D) They have higher boiling points than alkanes of similar molar mass.
E) They cannot form hydrogen bonds with water because they have no hydrogen atoms bonded to oxygen.

One of the major differences between aldehydes and ketones as compared to other carbonyl compounds is that in aldehydes and ketones

A) the molar masses tend to be much smaller than in the other types of compounds.
B) the carbonyl carbon has bond angles of 120°C, unlike the comparable bond angles in other carbonyl compounds.
C) the polar carbon-oxygen bond is less reactive than the hydrocarbon portion of the molecule.
D) the carbonyl group carbon atom is bonded to atoms that do not attract electrons strongly.
E) none of the above

Draw formaldehyde

...

The correct name for CH3CH(CH3)CH2COCH3 is

A) 2-methyl-4-pentanone.
B) 4-methyl-2-pentanone.
C) 2-methyl-4-butanone.
D) 4-methyl-2-butanone.
E) isobutyl acetone.

Which of the following is not a property of aldehydes and ketones?

A) They are polar.
B) Most have distinctive odors.
C) They have lower boiling points than alcohols of similar molar mass.
D) They have higher boiling points than alkanes of similar molar mass.
E) They cannot form hydrogen bonds with water because they have no hydrogen atoms bonded to oxygen.

Which compound has the lowest boiling point?

A) CH3CHO
B) CH3CH2CHO
C) CH3CH2OH
D) CH3CH2CH2OH
E) CH3COCH3

Draw methyl ethyl ketone. The correct systematic name and structural formula of this compound are

2-butanone;

Oxidation of a ketone produces

A) a carboxylic acid.
B) a primary alcohol.
C) a secondary alcohol.
D) an aldehyde.
E) no reaction.

What is the product of oxidation of 2-butanone?

A) butanal
B) 2-butanol
C) butanoic acid
D) 1-butanol
E) no reaction

What is the product of the oxidation of a ketone?

A) an alcohol
B) an aldehyde
C) a carboxylic acid
D) a hemiacetal
E) None, ketones don't oxidize.

Reduction of a ketone produces a(an

A) carboxylic acid.
B) primary alcohol.
C) secondary alcohol.
D) tertiary alcohol.
E) aldehyde.

What is the product of reduction of 2-butanone?

A) butanal
B) 2-butanol
C) butanoic acid
D) 1-butanol
E) no reaction

Which pair of compounds can react to form a hemiacetal?

A) CH3CH2CHO and CH3CH2OH
B) CH3COCH3 and CH3CH2CHO
C) CH3CH2CHO and CH3COOH
D) CH3COCH3 and CH3COOH
E) CH3COOH and CH3CH2OH

Which compound is a tertiary alcohol?

A) 1-propanol
B) 2-methyl-1-hexanol
C) 2-methyl-2-hexanolD) 3-methyl-2-hexanol
E) 3-hexanol

Which compound is the most soluble in water?

A) CH3CH2CH2CH2OH
B) CH3CH2CH2OH
C) CH3CH2CH2CH3
D) CH3CH2CH3
E) CH3CH2CH2CH2CH2CH2CH2CH3

The product of dehydration of an alcohol is an

A) alkane.
B) alkene.
C) aromatic.
D) ether.
E) aldehyde.

Oxidation of a tertiary alcohol will produce

A) an aldehyde.
B) a ketone.
C) an alkene.
D) a carboxylic acid.
E) no reaction.

The major product obtained from dehydration of 2-hexanol is

A) 1-hexene.
B) 2-hexene.
C) 3-hexene.
D) 2-hexanone.
E) 2-hexanal.

The most characteristic feature of thiols is ________

A) odor
B) solubility in water
C) reactivity with water
D) boiling point
E) color

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