Q. Which quantum number is not required to describe the electron in an atom? (2019)
-
A.
Principal quantum number
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B.
Azimuthal quantum number
-
C.
Magnetic quantum number
-
D.
Color quantum number
Solution
Color quantum number is not a valid quantum number for describing electrons in an atom.
Correct Answer: D — Color quantum number
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Q. Which quarter showed the lowest overall sales across all products according to the table?
Solution
Q1 showed the lowest overall sales across all products.
Correct Answer: A — Q1
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Q. Which reaction involves the addition of water to an alkene?
-
A.
Hydrogenation
-
B.
Hydrolysis
-
C.
Hydration
-
D.
Dehydration
Solution
The addition of water to an alkene is called hydration.
Correct Answer: C — Hydration
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Q. Which reaction is characteristic of alcohols? (2020)
-
A.
Dehydration
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B.
Hydrogenation
-
C.
Halogenation
-
D.
Oxidation
Solution
Dehydration is a characteristic reaction of alcohols where they lose water to form alkenes.
Correct Answer: A — Dehydration
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Q. Which reaction is characteristic of alkenes?
-
A.
Hydrogenation
-
B.
Halogenation
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C.
Hydrolysis
-
D.
Oxidation
Solution
Alkenes readily undergo halogenation due to the presence of a double bond.
Correct Answer: B — Halogenation
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Q. Which reaction is characteristic of alkynes?
-
A.
Hydrogenation
-
B.
Halogenation
-
C.
Hydrohalogenation
-
D.
All of the above
Solution
Alkynes can undergo hydrogenation, halogenation, and hydrohalogenation.
Correct Answer: D — All of the above
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Q. Which reaction is characteristic of carboxylic acids? (2021)
-
A.
Esterification
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B.
Hydrogenation
-
C.
Halogenation
-
D.
Dehydration
Solution
Esterification is a characteristic reaction of carboxylic acids, where they react with alcohols to form esters.
Correct Answer: A — Esterification
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Q. Which reaction is commonly used to convert alkynes to alkenes?
-
A.
Hydrogenation
-
B.
Halogenation
-
C.
Hydroboration
-
D.
Dehydrohalogenation
Solution
Hydrogenation is used to convert alkynes to alkenes.
Correct Answer: A — Hydrogenation
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Q. Which reaction is used to convert alkenes to alkanes?
-
A.
Hydrogenation
-
B.
Halogenation
-
C.
Hydrolysis
-
D.
Dehydrogenation
Solution
Hydrogenation is the process of adding hydrogen to alkenes to convert them into alkanes.
Correct Answer: A — Hydrogenation
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Q. Which reaction is used to prepare alkynes from alkenes?
-
A.
Hydrogenation
-
B.
Dehydrohalogenation
-
C.
Hydrohalogenation
-
D.
Halogenation
Solution
Dehydrohalogenation of vicinal dihalides can be used to prepare alkynes from alkenes.
Correct Answer: B — Dehydrohalogenation
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Q. Which reaction is used to prepare amines from alkyl halides? (2020)
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A.
Nitration
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B.
Hydrogenation
-
C.
Nucleophilic substitution
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D.
Electrophilic substitution
Solution
Amines can be prepared from alkyl halides through nucleophilic substitution reactions where the amine acts as a nucleophile.
Correct Answer: C — Nucleophilic substitution
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Q. Which reaction is used to prepare amines from alkyl halides? (2020) 2020
-
A.
Hydrogenation
-
B.
Nucleophilic substitution
-
C.
Electrophilic substitution
-
D.
Dehydrohalogenation
Solution
Amines can be prepared from alkyl halides through nucleophilic substitution reactions, where the halide is replaced by an amine group.
Correct Answer: B — Nucleophilic substitution
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Q. Which reaction is used to prepare carboxylic acids from alcohols? (2020)
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A.
Oxidation
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B.
Reduction
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C.
Hydrolysis
-
D.
Dehydration
Solution
Oxidation of alcohols leads to the formation of carboxylic acids.
Correct Answer: A — Oxidation
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Q. Which reaction is used to prepare primary amines from alkyl halides? (2022)
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A.
Reduction
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B.
Hydrolysis
-
C.
Nucleophilic substitution
-
D.
Dehydrohalogenation
Solution
Primary amines can be prepared from alkyl halides through nucleophilic substitution reactions with ammonia.
Correct Answer: C — Nucleophilic substitution
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Q. Which reading strategy involves creating mental images?
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A.
Visualizing
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B.
Summarizing
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C.
Skimming
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D.
Scanning
Solution
Visualizing involves creating mental images of the content being read, which aids in comprehension.
Correct Answer: A — Visualizing
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Q. Which reagent can be used to convert a haloalkane into an alcohol?
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A.
Sodium hydroxide
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B.
Sodium chloride
-
C.
Sodium bromide
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D.
Sodium acetate
Solution
Sodium hydroxide (NaOH) can be used to perform nucleophilic substitution, converting haloalkanes into alcohols.
Correct Answer: A — Sodium hydroxide
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Q. Which reagent can be used to convert a haloalkane to an alcohol?
-
A.
Sodium hydroxide
-
B.
Sodium metal
-
C.
Hydrochloric acid
-
D.
Bromine
Solution
Sodium hydroxide can be used to convert haloalkanes to alcohols through nucleophilic substitution.
Correct Answer: A — Sodium hydroxide
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Q. Which reagent can be used to convert an alkyl halide to an alcohol?
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A.
H2O
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B.
NaOH
-
C.
KBr
-
D.
HCl
Solution
NaOH can be used to convert an alkyl halide to an alcohol through nucleophilic substitution.
Correct Answer: B — NaOH
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Q. Which reagent can be used to convert an alkyne to a diketone?
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A.
KMnO4
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B.
O3
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C.
H2O
-
D.
H2SO4
Solution
Ozonolysis of an alkyne can yield a diketone.
Correct Answer: B — O3
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Q. Which reagent can be used to convert an alkyne to a ketone?
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A.
H2O/H2SO4
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B.
LiAlH4
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C.
B2H6
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D.
KMnO4
Solution
The hydration of an alkyne using H2O in the presence of H2SO4 leads to the formation of a ketone.
Correct Answer: A — H2O/H2SO4
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Q. Which reagent can be used to distinguish between an alkyne and an alkene?
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A.
Bromine water
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B.
Sodium metal
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C.
Potassium permanganate
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D.
Hydrochloric acid
Solution
Bromine water can be used to distinguish between an alkyne and an alkene, as alkynes will decolorize it.
Correct Answer: A — Bromine water
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Q. Which reagent can be used to test for the presence of alkenes?
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A.
Bromine water
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B.
Silver nitrate
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C.
Sodium hydroxide
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D.
Hydrochloric acid
Solution
Bromine water is used to test for alkenes; it will decolorize in the presence of a double bond.
Correct Answer: A — Bromine water
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Q. Which reagent is commonly used for the Friedel-Crafts alkylation of benzene?
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A.
AlCl3
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B.
H2SO4
-
C.
NaOH
-
D.
KMnO4
Solution
Aluminum chloride (AlCl3) is commonly used as a catalyst in Friedel-Crafts alkylation reactions to introduce alkyl groups onto benzene.
Correct Answer: A — AlCl3
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Q. Which reagent is commonly used for the hydrogenation of alkenes?
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A.
H2/Pt
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B.
H2O
-
C.
Br2
-
D.
NaOH
Solution
H2 in the presence of a catalyst like platinum (Pt) is commonly used for the hydrogenation of alkenes.
Correct Answer: A — H2/Pt
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Q. Which reagent is commonly used for the ozonolysis of alkenes?
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A.
KMnO4
-
B.
O3
-
C.
H2O2
-
D.
NaBH4
Solution
Ozonolysis of alkenes is performed using ozone (O3) to cleave the double bond and form carbonyl compounds.
Correct Answer: B — O3
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Q. Which reagent is commonly used in the nitration of benzene?
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A.
H2SO4
-
B.
HNO3
-
C.
HCl
-
D.
NaOH
Solution
In the nitration of benzene, a mixture of concentrated nitric acid (HNO3) and sulfuric acid (H2SO4) is used to introduce a nitro group.
Correct Answer: B — HNO3
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Q. Which reagent is commonly used to convert a carboxylic acid to an acid chloride?
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A.
SOCl2
-
B.
PCl5
-
C.
PCl3
-
D.
All of the above
Solution
All of the listed reagents can convert carboxylic acids to acid chlorides.
Correct Answer: D — All of the above
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Q. Which reagent is commonly used to convert a carboxylic acid to an alcohol?
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A.
LiAlH4
-
B.
NaBH4
-
C.
H2/Pd
-
D.
SOCl2
Solution
Lithium aluminum hydride (LiAlH4) is a strong reducing agent that can reduce carboxylic acids to primary alcohols.
Correct Answer: A — LiAlH4
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Q. Which reagent is commonly used to convert alcohols to alkyl halides?
-
A.
SOCl2
-
B.
HCl
-
C.
PBr3
-
D.
All of the above
Solution
All of the listed reagents (SOCl2, HCl, PBr3) can be used to convert alcohols to alkyl halides.
Correct Answer: D — All of the above
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Q. Which reagent is commonly used to convert alkynes to alkenes?
-
A.
H2/Pd
-
B.
LiAlH4
-
C.
Br2
-
D.
KMnO4
Solution
Hydrogenation using H2 in the presence of a catalyst like Pd converts alkynes to alkenes.
Correct Answer: A — H2/Pd
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