Q. What is the hybridization of the nitrogen atom in a primary amine?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
The nitrogen atom in a primary amine is sp3 hybridized.
Correct Answer: C — sp3
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Q. What is the hybridization of the nitrogen atom in an amine?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
sp3d
Solution
The nitrogen atom in amines is sp3 hybridized, having a tetrahedral geometry with one lone pair.
Correct Answer: C — sp3
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Q. What is the hybridization of the nitrogen atom in NH3?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
dsp3
Solution
In NH3, nitrogen has three bonds and one lone pair, leading to sp3 hybridization.
Correct Answer: C — sp3
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Q. What is the hybridization of the phosphorus atom in PCl5?
-
A.
sp
-
B.
sp2
-
C.
sp3
-
D.
d2sp3
Solution
In PCl5, phosphorus is surrounded by five chlorine atoms, indicating d2sp3 hybridization.
Correct Answer: D — d2sp3
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Q. What is the integrated rate law for a first-order reaction?
-
A.
ln[A] = -kt + ln[A]0
-
B.
[A] = [A]0 - kt
-
C.
[A] = [A]0e^(-kt)
-
D.
1/[A] = kt + 1/[A]0
Solution
The integrated rate law for a first-order reaction is ln[A] = -kt + ln[A]0.
Correct Answer: A — ln[A] = -kt + ln[A]0
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Q. What is the isoelectric point (pI) of a protein?
-
A.
The pH at which the protein is positively charged
-
B.
The pH at which the protein is negatively charged
-
C.
The pH at which the protein has no net charge
-
D.
The pH at which the protein is denatured
Solution
The isoelectric point (pI) of a protein is the pH at which the protein has no net charge, leading to minimal solubility.
Correct Answer: C — The pH at which the protein has no net charge
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Q. What is the isoelectric point of a protein?
-
A.
The pH at which the protein is positively charged
-
B.
The pH at which the protein is negatively charged
-
C.
The pH at which the protein has no net charge
-
D.
The pH at which the protein denatures
Solution
The isoelectric point of a protein is the pH at which the protein has no net charge, leading to minimal solubility.
Correct Answer: C — The pH at which the protein has no net charge
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Q. What is the IUPAC name for CH3-CH2-CH=CH2?
-
A.
Butene
-
B.
Propene
-
C.
Butyne
-
D.
Pentene
Solution
The IUPAC name for CH3-CH2-CH=CH2 is butene.
Correct Answer: A — Butene
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Q. What is the IUPAC name for CH3-CH2-CHO?
-
A.
Ethyl alcohol
-
B.
Propionaldehyde
-
C.
Acetaldehyde
-
D.
Butyraldehyde
Solution
The IUPAC name for CH3-CH2-CHO is acetaldehyde.
Correct Answer: C — Acetaldehyde
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Q. What is the IUPAC name for the compound C2H5-CHO?
-
A.
Ethanal
-
B.
Propanoic acid
-
C.
Acetaldehyde
-
D.
Butanal
Solution
The compound is an aldehyde with two carbons, hence the name is Ethanal.
Correct Answer: A — Ethanal
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Q. What is the IUPAC name for the compound C2H5-CO-CH3?
-
A.
2-Pentanone
-
B.
3-Pentanone
-
C.
Butan-2-one
-
D.
Butan-3-one
Solution
The compound is a ketone with four carbons, and the carbonyl group is on the second carbon, hence Butan-2-one.
Correct Answer: C — Butan-2-one
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Q. What is the IUPAC name for the compound C2H5OH?
-
A.
Ethanol
-
B.
Ethylene
-
C.
Ethane
-
D.
Acetaldehyde
Solution
C2H5OH is ethanol, which is an alcohol with two carbon atoms.
Correct Answer: A — Ethanol
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Q. What is the IUPAC name for the compound C3H6O?
-
A.
Propylene oxide
-
B.
Acetone
-
C.
Propanal
-
D.
Cyclopropanol
Solution
C3H6O is an aldehyde with three carbons, named Propanal.
Correct Answer: C — Propanal
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Q. What is the IUPAC name for the compound C3H7-CO-CH3?
-
A.
2-Pentanone
-
B.
3-Pentanone
-
C.
Butan-2-one
-
D.
Butan-3-one
Solution
The compound is a ketone with a four-carbon chain, and the carbonyl group is on the second carbon, hence it is Butan-2-one.
Correct Answer: C — Butan-2-one
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Q. What is the IUPAC name for the compound C6H12O?
-
A.
Hexanal
-
B.
Hexan-1-ol
-
C.
Cyclohexanol
-
D.
2-Hexanol
Solution
The compound is a cyclic alcohol with six carbons, hence it is named Cyclohexanol.
Correct Answer: C — Cyclohexanol
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Q. What is the IUPAC name for the compound C6H5-CH(CH3)-OH?
-
A.
Benzyl alcohol
-
B.
Phenylpropan-2-ol
-
C.
2-Phenylpropan-1-ol
-
D.
2-Phenylpropan-2-ol
Solution
The compound has a phenyl group and a hydroxyl group on the second carbon of a three-carbon chain, hence it is Phenylpropan-2-ol.
Correct Answer: B — Phenylpropan-2-ol
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Q. What is the IUPAC name for the compound CH3-CH(CH3)-CH2-CH3?
-
A.
2-Methylbutane
-
B.
3-Methylbutane
-
C.
Butane
-
D.
Pentane
Solution
The longest chain has four carbons, and there is a methyl group on the second carbon, making it 2-Methylbutane.
Correct Answer: A — 2-Methylbutane
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Q. What is the IUPAC name for the compound CH3-CH(CH3)-CH2-CHO?
-
A.
3-Methylbutanal
-
B.
2-Methylbutanal
-
C.
4-Methylbutanal
-
D.
Pentanal
Solution
The longest chain has four carbons with an aldehyde group, and the methyl group is on the second carbon, making it 2-Methylbutanal.
Correct Answer: B — 2-Methylbutanal
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Q. What is the IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?
-
A.
Pentanoic acid
-
B.
Butanoic acid
-
C.
Hexanoic acid
-
D.
Heptanoic acid
Solution
The longest carbon chain contains five carbons, and the functional group is a carboxylic acid, hence the name is Pentanoic acid.
Correct Answer: A — Pentanoic acid
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Q. What is the IUPAC name for the compound with the formula C2H5-CHO?
-
A.
Ethanal
-
B.
Propanoic acid
-
C.
Acetaldehyde
-
D.
Butanal
Solution
The compound is an aldehyde with two carbons, which is named Acetaldehyde or Ethanal.
Correct Answer: C — Acetaldehyde
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Q. What is the IUPAC name for the compound with the formula C2H5-CO-CH3?
-
A.
2-Pentanone
-
B.
3-Pentanone
-
C.
Butan-2-one
-
D.
Butan-3-one
Solution
The compound has a ketone functional group with 4 carbons, making it Butan-2-one.
Correct Answer: C — Butan-2-one
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Q. What is the IUPAC name for the compound with the formula C2H5OH?
-
A.
Ethanol
-
B.
Ethylene glycol
-
C.
Ethyl alcohol
-
D.
Dimethyl ether
Solution
C2H5OH is an alcohol with 2 carbons, named Ethanol.
Correct Answer: A — Ethanol
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Q. What is the IUPAC name for the compound with the formula C3H6?
-
A.
Propene
-
B.
Cyclopropane
-
C.
Propyne
-
D.
Propane
Solution
C3H6 is an alkene with three carbons, which is named Propene.
Correct Answer: A — Propene
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Q. What is the IUPAC name for the compound with the formula C3H7-CO-CH3?
-
A.
Butan-2-one
-
B.
Propan-2-one
-
C.
Pentanal
-
D.
Butanal
Solution
The compound is a ketone with 4 carbons, and the carbonyl group is on the second carbon, making it Butan-2-one.
Correct Answer: A — Butan-2-one
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Q. What is the IUPAC name for the compound with the formula C3H7-COOH?
-
A.
Propanoic acid
-
B.
Butanoic acid
-
C.
Acetic acid
-
D.
Isobutyric acid
Solution
The compound is isobutyric acid, which is a branched-chain carboxylic acid with three carbons.
Correct Answer: D — Isobutyric acid
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Q. What is the IUPAC name for the compound with the formula C3H7OH?
-
A.
Propan-1-ol
-
B.
Propan-2-ol
-
C.
Butan-1-ol
-
D.
Methanol
Solution
The compound is an alcohol with three carbons and the hydroxyl group on the second carbon, hence the name is Propan-2-ol.
Correct Answer: B — Propan-2-ol
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Q. What is the IUPAC name for the compound with the formula C3H8?
-
A.
Propene
-
B.
Propane
-
C.
Propyne
-
D.
Cyclopropane
Solution
C3H8 is propane, which is an alkane.
Correct Answer: B — Propane
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Q. What is the IUPAC name for the compound with the formula C4H10O?
-
A.
Butanol
-
B.
Butanal
-
C.
Ethyl methyl ether
-
D.
Tert-butanol
Solution
C4H10O can be identified as an alcohol with 4 carbons, which is named Butanol.
Correct Answer: A — Butanol
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Q. What is the IUPAC name for the compound with the formula C4H8O?
-
A.
Butanal
-
B.
Butan-2-ol
-
C.
Butan-1-ol
-
D.
Cyclobutanol
Solution
C4H8O can correspond to butan-2-ol, which is a secondary alcohol.
Correct Answer: B — Butan-2-ol
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Q. What is the IUPAC name for the compound with the formula C4H9-CHO?
-
A.
Butanal
-
B.
Pentanal
-
C.
Propionaldehyde
-
D.
Isobutyraldehyde
Solution
The compound has four carbons and an aldehyde functional group, making it Butanal.
Correct Answer: A — Butanal
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