ORGANIC CHEMISTRY 2ND EDITION KLEIN|TEST QUESTIONS
AND ANSWERED CORRECTLY GRADED A+
1.Alkane - ANSWER are a class of saturated hydrocarbons, meaning all the bonds between carbon atoms
are single covalent bonds. They are the simplest type of hydrocarbon and follow a general formula
based on the number of carbon atoms.
2. Alkene - ANSWER are a class of hydrocarbons that contain at least one carbon-carbon double bond
(C=C). They are unsaturated hydrocarbons, meaning they have fewer hydrogen atoms than alkanes
(which are fully saturated with hydrogen).
3. Alkyne - ANSWER a class of unsaturated hydrocarbons that contain at least one carbon–carbon triple
bond (≡). This makes them more reactive than alkanes and alkenes due to the high electron density of
the triple bond.
4. Alcohol - ANSWER are a group of organic compounds that contain one or more hydroxyl (-OH) groups
attached to a saturated carbon atom (i.e., carbon with single bonds only).
5. Ether - ANSWER organic compounds with the general structure:
R–O–R’\text{R–O–R'}R–O–R’
Where R and R' are alkyl or aryl groups (they can be the same or different). The oxygen atom is bonded
to two carbon-containing groups.
6. Ester - ANSWER organic compounds formed from the reaction between a carboxylic acid and an
alcohol. They are widely known for their sweet, fruity smells and are commonly found in fruits,
perfumes, and flavorings.
7. Amine - ANSWER organic compounds derived from ammonia (NH₃) by replacing one or more
hydrogen atoms with alkyl or aryl groups. They contain the –NH₂ (amino) group or substituted versions
of it.
,8. Aldehyde - ANSWER are a class of organic compounds that contain the carbonyl group (C=O) bonded
to at least one hydrogen atom. They are highly reactive and important in both organic chemistry and
biochemistry.
9. Ketone - ANSWER An organic compound with a carbonyl group of which the carbon atom is bonded to
two other carbons.
10. Alkoxy - ANSWER is an -OR group, an alkyl (or aryl) group atttached to an oxygen atom.
11. Alkyl group - ANSWER alkyl group is a fragment of a hydrocarbon molecule that contains only single
bonds (derived from
12. Carbonyl - ANSWER carbon atom with a double bond to an oxygen atom
13. Hydroxyl - ANSWER A functional group consisting of a hydrogen atom joined to an oxygen atom by a
polar covalent bond. Molecules possessing this group are soluble in water and are called alcohols.
14. Acetyl - ANSWER In organic chemistry, acetyl is a functional group, the acyl with chemical formula
CH3CO. It is sometimes represented by the symbol Ac (not to be confused with the element actinium).
The acetyl group contains a methyl group single-bonded to a carbonyl.
15. Gem-/Vic- - ANSWER Vicinal on 2 different adjacent carbons
Geminal- on same carbon
16. Tosyl - ANSWER a compound containing the functional group -SO3C6H4CH3, derived from
toluenesulfonic acid.
17. Mesyl - ANSWER a compound containing the functional group -SO3CH3, derived from
methanesulfonic acid.
18. Carboxylic Acid - ANSWER are organic compounds that contain the carboxyl functional group (-
COOH), which consists of a carbonyl (C=O) and a hydroxyl (–OH) group attached to the same carbon
atom.
,19. Anhydride - ANSWER A functional group containing two carbonyls separated by an oxygen atom
(RCOOCOR); often the condensation dimer of a carboxylic acid.
20. Aryl - ANSWER organic halide in which the halogen atom is attached to an aromatic ring, such as a
benzene ring
>.Halogens (fluorine, chlorine, bromine, iodine, astatine) are nonmetal elements that are highly
electronegative and reactive.
22. Benzyl - ANSWER benzyl is the substituent or molecular fragment possessing the structure C6H5CH2-
. Benzyl features a benzene ring attached to a CH2 group.
23. Hydrazine - ANSWER is an inorganic compound with the formula:
N2H4\text{N}_2\text{H}_4N2H4
It consists of two nitrogen atoms single-bonded to each other, each bonded to two hydrogen atoms. It’s
structurally similar to hydrogen peroxide (H₂O₂), but with nitrogen atoms replacing oxygen.
24. Vinyl - ANSWER vinyl or ethenyl is the functional group −CH=CH2, namely the ethylene (IUPAC
ethene) molecule (H2C=CH2) minus one hydrogen atom. The name is also used for any compound
containing that group, namely R−CH=CH2 where R is any other group of atoms.
25.Allyl - ANSWER An allyl group is a substituent with the structural formula H2C=CH-CH2R, where R is
the rest of the molecule
26. Nitrile - ANSWER A nitrile is an organic chemical that contains a cyano functional group (subunit), CN-
, in which the carbon and nitrogen atoms have a triple bond i.e. C≡N-. The general chemical formula of a
nitrile is RCN, where R is the organic group.
27. Epoxide - ANSWER ` are a class of organic compounds featuring a three-membered cyclic ether. The
ring consists of two carbon atoms and one oxygen atom forming a highly strained triangle.
, 28. Enamine/Imine - ANSWER An enamine is an unsaturated compound derived by the condensation of
an aldehyde or ketone with a secondary amine. Enamines are considered to be nitrogen analogs of
enols. If one of the nitrogen substituents is a hydrogen atom, H, it is the tautomeric form of an imine.
29. Acyl - ANSWER a functional group derived by the removal of one or more hydroxyl groups from an
oxoacid,[1] including inorganic acids. It contains a double bonded oxygen atom and an alkyl group.
30. Aromatic - ANSWER are a special class of organic molecules characterized by stable ring structures
with delocalized π (pi) electrons that follow specific rules of aromaticity.
31. Aliphatic - ANSWER In organic chemistry, hydrocarbons (compounds composed of carbon and
hydrogen) are divided into two classes: aromatic compounds and aliphatic compounds also known as
non-aromatic compounds.
> Aliphatics can be cyclic, but only aromatic compounds contain an especially stable ring of atoms, such
as benzene.
>Aliphatic compounds can be saturated, like Hexane, or unsaturated, like Hexene and Hexyne. Open-
chain compounds (whether straight or branched) contain no rings of any type, and are thus aliphatic.
32. Sulphone - ANSWER an organic compound containing a sulfonyl group linking two organic groups.
33. Nitro - ANSWER Nitro compounds are organic compounds that contain one or more nitro functional
groups (−NO2). The nitro group is one of the most common explosophores (functional group that makes
a compound explosive) used globally. The nitro group is also strongly electron-withdrawing
34. Acetal - ANSWER An acetal is a functional group with the following connectivity R2C(OR')2, where
both R' groups are organic fragments.
35. Ketal - ANSWER term ketal is sometimes used to identify structures associated with ketones rather
than aldehydes and, historically, the term acetal was used specifically for the aldehyde cases.
36. Hemiacetal - ANSWER A functional group that contains a carbon atom bonded to one -OR group, one
-OH group, an alkyl chain, and a hydrogen atom.
AND ANSWERED CORRECTLY GRADED A+
1.Alkane - ANSWER are a class of saturated hydrocarbons, meaning all the bonds between carbon atoms
are single covalent bonds. They are the simplest type of hydrocarbon and follow a general formula
based on the number of carbon atoms.
2. Alkene - ANSWER are a class of hydrocarbons that contain at least one carbon-carbon double bond
(C=C). They are unsaturated hydrocarbons, meaning they have fewer hydrogen atoms than alkanes
(which are fully saturated with hydrogen).
3. Alkyne - ANSWER a class of unsaturated hydrocarbons that contain at least one carbon–carbon triple
bond (≡). This makes them more reactive than alkanes and alkenes due to the high electron density of
the triple bond.
4. Alcohol - ANSWER are a group of organic compounds that contain one or more hydroxyl (-OH) groups
attached to a saturated carbon atom (i.e., carbon with single bonds only).
5. Ether - ANSWER organic compounds with the general structure:
R–O–R’\text{R–O–R'}R–O–R’
Where R and R' are alkyl or aryl groups (they can be the same or different). The oxygen atom is bonded
to two carbon-containing groups.
6. Ester - ANSWER organic compounds formed from the reaction between a carboxylic acid and an
alcohol. They are widely known for their sweet, fruity smells and are commonly found in fruits,
perfumes, and flavorings.
7. Amine - ANSWER organic compounds derived from ammonia (NH₃) by replacing one or more
hydrogen atoms with alkyl or aryl groups. They contain the –NH₂ (amino) group or substituted versions
of it.
,8. Aldehyde - ANSWER are a class of organic compounds that contain the carbonyl group (C=O) bonded
to at least one hydrogen atom. They are highly reactive and important in both organic chemistry and
biochemistry.
9. Ketone - ANSWER An organic compound with a carbonyl group of which the carbon atom is bonded to
two other carbons.
10. Alkoxy - ANSWER is an -OR group, an alkyl (or aryl) group atttached to an oxygen atom.
11. Alkyl group - ANSWER alkyl group is a fragment of a hydrocarbon molecule that contains only single
bonds (derived from
12. Carbonyl - ANSWER carbon atom with a double bond to an oxygen atom
13. Hydroxyl - ANSWER A functional group consisting of a hydrogen atom joined to an oxygen atom by a
polar covalent bond. Molecules possessing this group are soluble in water and are called alcohols.
14. Acetyl - ANSWER In organic chemistry, acetyl is a functional group, the acyl with chemical formula
CH3CO. It is sometimes represented by the symbol Ac (not to be confused with the element actinium).
The acetyl group contains a methyl group single-bonded to a carbonyl.
15. Gem-/Vic- - ANSWER Vicinal on 2 different adjacent carbons
Geminal- on same carbon
16. Tosyl - ANSWER a compound containing the functional group -SO3C6H4CH3, derived from
toluenesulfonic acid.
17. Mesyl - ANSWER a compound containing the functional group -SO3CH3, derived from
methanesulfonic acid.
18. Carboxylic Acid - ANSWER are organic compounds that contain the carboxyl functional group (-
COOH), which consists of a carbonyl (C=O) and a hydroxyl (–OH) group attached to the same carbon
atom.
,19. Anhydride - ANSWER A functional group containing two carbonyls separated by an oxygen atom
(RCOOCOR); often the condensation dimer of a carboxylic acid.
20. Aryl - ANSWER organic halide in which the halogen atom is attached to an aromatic ring, such as a
benzene ring
>.Halogens (fluorine, chlorine, bromine, iodine, astatine) are nonmetal elements that are highly
electronegative and reactive.
22. Benzyl - ANSWER benzyl is the substituent or molecular fragment possessing the structure C6H5CH2-
. Benzyl features a benzene ring attached to a CH2 group.
23. Hydrazine - ANSWER is an inorganic compound with the formula:
N2H4\text{N}_2\text{H}_4N2H4
It consists of two nitrogen atoms single-bonded to each other, each bonded to two hydrogen atoms. It’s
structurally similar to hydrogen peroxide (H₂O₂), but with nitrogen atoms replacing oxygen.
24. Vinyl - ANSWER vinyl or ethenyl is the functional group −CH=CH2, namely the ethylene (IUPAC
ethene) molecule (H2C=CH2) minus one hydrogen atom. The name is also used for any compound
containing that group, namely R−CH=CH2 where R is any other group of atoms.
25.Allyl - ANSWER An allyl group is a substituent with the structural formula H2C=CH-CH2R, where R is
the rest of the molecule
26. Nitrile - ANSWER A nitrile is an organic chemical that contains a cyano functional group (subunit), CN-
, in which the carbon and nitrogen atoms have a triple bond i.e. C≡N-. The general chemical formula of a
nitrile is RCN, where R is the organic group.
27. Epoxide - ANSWER ` are a class of organic compounds featuring a three-membered cyclic ether. The
ring consists of two carbon atoms and one oxygen atom forming a highly strained triangle.
, 28. Enamine/Imine - ANSWER An enamine is an unsaturated compound derived by the condensation of
an aldehyde or ketone with a secondary amine. Enamines are considered to be nitrogen analogs of
enols. If one of the nitrogen substituents is a hydrogen atom, H, it is the tautomeric form of an imine.
29. Acyl - ANSWER a functional group derived by the removal of one or more hydroxyl groups from an
oxoacid,[1] including inorganic acids. It contains a double bonded oxygen atom and an alkyl group.
30. Aromatic - ANSWER are a special class of organic molecules characterized by stable ring structures
with delocalized π (pi) electrons that follow specific rules of aromaticity.
31. Aliphatic - ANSWER In organic chemistry, hydrocarbons (compounds composed of carbon and
hydrogen) are divided into two classes: aromatic compounds and aliphatic compounds also known as
non-aromatic compounds.
> Aliphatics can be cyclic, but only aromatic compounds contain an especially stable ring of atoms, such
as benzene.
>Aliphatic compounds can be saturated, like Hexane, or unsaturated, like Hexene and Hexyne. Open-
chain compounds (whether straight or branched) contain no rings of any type, and are thus aliphatic.
32. Sulphone - ANSWER an organic compound containing a sulfonyl group linking two organic groups.
33. Nitro - ANSWER Nitro compounds are organic compounds that contain one or more nitro functional
groups (−NO2). The nitro group is one of the most common explosophores (functional group that makes
a compound explosive) used globally. The nitro group is also strongly electron-withdrawing
34. Acetal - ANSWER An acetal is a functional group with the following connectivity R2C(OR')2, where
both R' groups are organic fragments.
35. Ketal - ANSWER term ketal is sometimes used to identify structures associated with ketones rather
than aldehydes and, historically, the term acetal was used specifically for the aldehyde cases.
36. Hemiacetal - ANSWER A functional group that contains a carbon atom bonded to one -OR group, one
-OH group, an alkyl chain, and a hydrogen atom.
