Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CH2-COOH?
-
A.
Hexanoic acid
-
B.
Pentanoic acid
-
C.
Heptanoic acid
-
D.
Octanoic acid
Solution
The longest chain has six carbons, and the functional group is a carboxylic acid, hence the name is Hexanoic acid.
Correct Answer: A — Hexanoic acid
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CH=CH2?
-
A.
1-Hexene
-
B.
2-Hexene
-
C.
3-Hexene
-
D.
Cyclohexene
Solution
The compound is an alkene with a double bond at the first carbon, named 1-Hexene.
Correct Answer: A — 1-Hexene
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CHO?
-
A.
Butanal
-
B.
Pentanal
-
C.
Hexanal
-
D.
Heptanal
Solution
The longest chain has five carbons and ends with an aldehyde, hence it is Pentanal.
Correct Answer: B — Pentanal
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-COOH?
-
A.
Pentanoic acid
-
B.
Hexanoic acid
-
C.
Butanoic acid
-
D.
Heptanoic acid
Solution
The compound has a carboxylic acid functional group and a five-carbon chain, making it Pentanoic acid.
Correct Answer: A — Pentanoic acid
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-COOH?
-
A.
Butanoic acid
-
B.
Propanoic acid
-
C.
Pentanoic acid
-
D.
Hexanoic acid
Solution
The compound has a carboxylic acid functional group and a four-carbon chain, making it Butanoic acid.
Correct Answer: A — Butanoic acid
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH=CH2?
-
A.
1-Butene
-
B.
2-Butene
-
C.
Butyne
-
D.
Butane
Solution
The compound has a double bond between the first and second carbons, making it 1-Butene.
Correct Answer: A — 1-Butene
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?
-
A.
Butan-2-one
-
B.
Propan-2-one
-
C.
Butan-1-one
-
D.
Pentanal
Solution
The compound is a ketone with four carbons and the carbonyl group on the second carbon, hence it is Butan-2-one.
Correct Answer: A — Butan-2-one
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CH2-COOH?
-
A.
Propanoic acid
-
B.
Butanoic acid
-
C.
Acetic acid
-
D.
Methanoic acid
Solution
The compound is a carboxylic acid with 3 carbons, named Propanoic acid.
Correct Answer: A — Propanoic acid
Learn More →
Q. What is the IUPAC name for the compound with the structure CH3-CO-CH2-COOH?
-
A.
3-Oxobutanoic acid
-
B.
2-Oxobutanoic acid
-
C.
Butanoic acid
-
D.
Acetic acid
Solution
The compound has a ketone and a carboxylic acid, making it 3-Oxobutanoic acid.
Correct Answer: A — 3-Oxobutanoic acid
Learn More →
Q. What is the IUPAC name of CH3-CH2-CH(CH3)-CH2-CH3?
-
A.
2-Pentyl
-
B.
3-Pentyl
-
C.
2-Methylpentane
-
D.
3-Methylpentane
Solution
The longest carbon chain has 5 carbons, and there is a methyl group on the second carbon, making it 2-Methylpentane.
Correct Answer: C — 2-Methylpentane
Learn More →
Q. What is the IUPAC name of CH3-CH2-CH2-CHO?
-
A.
Butanal
-
B.
Propionaldehyde
-
C.
Pentanal
-
D.
Hexanal
Solution
The compound is a four-carbon aldehyde, hence its IUPAC name is Butanal.
Correct Answer: A — Butanal
Learn More →
Q. What is the IUPAC name of CH3-CH2-CH2-COOH?
-
A.
Butanoic acid
-
B.
Propanoic acid
-
C.
Pentanoic acid
-
D.
Hexanoic acid
Solution
The longest carbon chain contains four carbons, and the functional group is a carboxylic acid, hence the name is Butanoic acid.
Correct Answer: A — Butanoic acid
Learn More →
Q. What is the IUPAC name of CH3-CH2-CHO?
-
A.
Ethanal
-
B.
Propanal
-
C.
Butanal
-
D.
Methanal
Solution
The compound CH3-CH2-CHO is an aldehyde and is named ethanal.
Correct Answer: A — Ethanal
Learn More →
Q. What is the IUPAC name of the compound with the formula C2H5-CO-CH3?
-
A.
Butan-2-one
-
B.
Propan-2-one
-
C.
Butan-1-one
-
D.
Propan-1-one
Solution
The compound is a ketone with four carbons, and the carbonyl group is on the second carbon, thus it is Butan-2-one.
Correct Answer: A — Butan-2-one
Learn More →
Q. What is the IUPAC name of the compound with the formula C6H5-CH2-CHO?
-
A.
Benzaldehyde
-
B.
Benzylaldehyde
-
C.
Phenylacetaldehyde
-
D.
Phenylaldehyde
Solution
The compound has a benzyl group and an aldehyde functional group, making the correct name Benzylaldehyde.
Correct Answer: B — Benzylaldehyde
Learn More →
Q. What is the IUPAC name of the compound with the structure CH3-CH(CH3)-C(CH3)2-CH2-CH3?
-
A.
2,3-Dimethylpentane
-
B.
3,3-Dimethylpentane
-
C.
2,2-Dimethylpentane
-
D.
3-Methylpentane
Solution
The longest chain has 5 carbons, and there are two methyl groups on the third carbon, so the name is 3,3-Dimethylpentane.
Correct Answer: B — 3,3-Dimethylpentane
Learn More →
Q. What is the main characteristic of geometric isomers?
-
A.
Different connectivity
-
B.
Different spatial arrangement
-
C.
Different molecular formula
-
D.
Different functional groups
Solution
Geometric isomers have the same connectivity but differ in the spatial arrangement of groups around a double bond.
Correct Answer: B — Different spatial arrangement
Learn More →
Q. What is the main characteristic of optical isomers?
-
A.
Different boiling points
-
B.
Different melting points
-
C.
Different optical activities
-
D.
Different molecular weights
Solution
Optical isomers differ in their ability to rotate plane-polarized light.
Correct Answer: C — Different optical activities
Learn More →
Q. What is the main product of the dehydration of ethanol?
-
A.
Ethylene
-
B.
Acetaldehyde
-
C.
Ethane
-
D.
Diethyl ether
Solution
The dehydration of ethanol primarily produces ethylene (ethene) through the elimination of water.
Correct Answer: A — Ethylene
Learn More →
Q. What is the main reason for the existence of geometric isomers?
-
A.
Presence of double bonds
-
B.
Presence of single bonds
-
C.
Presence of chiral centers
-
D.
Presence of functional groups
Solution
Geometric isomers arise due to restricted rotation around double bonds.
Correct Answer: A — Presence of double bonds
Learn More →
Q. What is the molecular formula of benzene?
-
A.
C6H6
-
B.
C6H12
-
C.
C6H10
-
D.
C6H8
Solution
Benzene has the molecular formula C6H6, indicating it is an aromatic hydrocarbon.
Correct Answer: A — C6H6
Learn More →
Q. What is the primary effect of a -CN group on a benzene ring?
-
A.
+M effect
-
B.
-M effect
-
C.
+I effect
-
D.
-I effect
Solution
-CN exhibits a -M effect as it withdraws electron density through resonance.
Correct Answer: B — -M effect
Learn More →
Q. What is the primary effect of the -COOH group on a benzene ring?
-
A.
+M effect
-
B.
-M effect
-
C.
+I effect
-
D.
-I effect
Solution
The -COOH group primarily exhibits a -M effect as it withdraws electron density through resonance.
Correct Answer: B — -M effect
Learn More →
Q. What is the primary effect of the -COOH group on aromatic compounds?
-
A.
+M effect
-
B.
-M effect
-
C.
+I effect
-
D.
-I effect
Solution
-COOH exhibits a -M effect as it withdraws electron density through resonance.
Correct Answer: B — -M effect
Learn More →
Q. What is the primary effect of the inductive effect in organic compounds?
-
A.
Stabilization of positive charge
-
B.
Stabilization of negative charge
-
C.
Delocalization of electrons
-
D.
Formation of hydrogen bonds
Solution
The inductive effect involves the shifting of electron density through sigma bonds, which stabilizes positive charges.
Correct Answer: A — Stabilization of positive charge
Learn More →
Q. What is the primary effect of the inductive effect in organic molecules?
-
A.
Stabilization of positive charge
-
B.
Stabilization of negative charge
-
C.
Delocalization of electrons
-
D.
Formation of hydrogen bonds
Solution
The inductive effect involves the shifting of electron density through sigma bonds, which can stabilize positive charges.
Correct Answer: A — Stabilization of positive charge
Learn More →
Q. What is the primary reason for the +M effect of -OCH3?
-
A.
Inductive effect
-
B.
Resonance effect
-
C.
Steric hindrance
-
D.
Electronegativity
Solution
The +M effect of -OCH3 is primarily due to resonance effect, where the lone pairs on oxygen can delocalize into the aromatic ring.
Correct Answer: B — Resonance effect
Learn More →
Q. What is the primary reason for the acidity of chloroacetic acid compared to acetic acid?
-
A.
Inductive effect
-
B.
Mesomeric effect
-
C.
Steric hindrance
-
D.
Hydrogen bonding
Solution
The inductive effect of the -Cl group in chloroacetic acid increases its acidity compared to acetic acid.
Correct Answer: A — Inductive effect
Learn More →
Q. What is the primary reason for the stability of phenol compared to cyclohexanol?
-
A.
Inductive effect
-
B.
Mesomeric effect
-
C.
Steric hindrance
-
D.
Hydrogen bonding
Solution
Phenol is stabilized by resonance (mesomeric effect) which is not present in cyclohexanol.
Correct Answer: B — Mesomeric effect
Learn More →
Q. What is the product of the complete combustion of an alkane?
-
A.
Carbon monoxide and water
-
B.
Carbon dioxide and water
-
C.
Carbon and hydrogen
-
D.
Hydrogen gas
Solution
The complete combustion of an alkane produces carbon dioxide and water.
Correct Answer: B — Carbon dioxide and water
Learn More →
Showing 61 to 90 of 233 (8 Pages)
