Chemistry MCQs

Organic Synthesis MCQs with Answers

Which of the following reagents is commonly used for the reduction of aldehydes and ketones?
a) Sodium borohydride
b) Lithium aluminum hydride
c) Sodium cyanoborohydride
d) Sodium hydride
Answer: a) Sodium borohydride

The reaction of an aldehyde or ketone with a primary amine results in the formation of:
a) An imine
b) An enamine
c) An enol
d) A lactone
Answer: a) An imine

What reagent is commonly used for the protection of alcohols?
a) Sodium borohydride
b) Lithium aluminum hydride
c) PBr3
d) TBDMS-Cl
Answer: d) TBDMS-Cl

Which of the following reagents is commonly used for the oxidation of primary alcohols to aldehydes?
a) Pyridinium chlorochromate (PCC)
b) Sodium borohydride
c) Sodium cyanoborohydride
d) Potassium permanganate (KMnO4)
Answer: a) Pyridinium chlorochromate (PCC)

The reaction of an alkene with hydrogen gas in the presence of a metal catalyst is known as:
a) Hydrogenation
b) Halogenation
c) Oxidation
d) Dehydration
Answer: a) Hydrogenation

Which of the following reagents is commonly used for the conversion of an alkene to an alcohol?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) Osmium tetroxide (OsO4)
d) Potassium permanganate (KMnO4)
Answer: c) Osmium tetroxide (OsO4)

The reaction of an alkene with a halogen results in the formation of a:
a) Halohydrin
b) Alkane
c) Haloalkane
d) Alkene cannot react with a halogen
Answer: c) Haloalkane

Which of the following reagents is commonly used for the conversion of an alkene to an alkyl halide?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) NBS (N-bromosuccinimide)
d) Potassium permanganate (KMnO4)
Answer: c) NBS (N-bromosuccinimide)

The reaction of an alkene with water in the presence of an acid catalyst is known as:
a) Hydrogenation
b) Hydration
c) Oxidation
d) Dehydration
Answer: b) Hydration

Which of the following reagents is commonly used for the conversion of an alkene to an epoxide?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) Methylmagnesium bromide (CH3MgBr)
d) Peroxyacetic acid (CH3CO3H)
Answer: d) Peroxyacetic acid (CH3CO3H)

The reaction of an alkyne with hydrogen gas in the presence of a metal catalyst is known as:
a) Hydrogenation
b) Halogenation
c) Oxidation
d) Dehydration
Answer: a) Hydrogenation

Which of the following reagents is commonly used for the conversion of an alkyne to an alkene?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) Lindlar’s catalyst
d) Potassium permanganate (KMnO4)
Answer: c) Lindlar’s catalyst

The reaction of an alkyne with a halogen results in the formation of a:
a) Halohydrin
b) Alkane
c) Haloalkane
d) Alkyne cannot react with a halogen
Answer: c) Haloalkane

Which of the following reagents is commonly used for the conversion of an alkyne to an alkyl halide?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) HBr (hydrogen bromide)
d) Potassium permanganate (KMnO4)
Answer: c) HBr (hydrogen bromide)

The reaction of an alkyne with water in the presence of an acid catalyst is known as:
a) Hydrogenation
b) Hydration
c) Oxidation
d) Dehydration
Answer: b) Hydration

Which of the following reagents is commonly used for the conversion of an alkyne to an alcohol?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) Osmium tetroxide (OsO4)
d) Potassium permanganate (KMnO4)
Answer: c) Osmium tetroxide (OsO4)

The reaction of an alkene with a peroxide in the presence of heat or light results in the formation of a:
a) Hydroxide ion
b) Peroxide ion
c) Carbocation
d) Radial cation
Answer: c) Carbocation

Which of the following reagents is commonly used for the conversion of an alkene to an alkane?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) Sodium metal (Na)
d) Potassium permanganate (KMnO4)
Answer: c) Sodium metal (Na)

The reaction of an alkene with ozone (O3) followed by treatment with a reducing agent results in the formation of:
a) An epoxide
b) An aldehyde
c) A ketone
d) A carboxylic acid
Answer: b) An aldehyde

Which of the following reagents is commonly used for the conversion of an alkene to a carboxylic acid?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) Osmium tetroxide (OsO4)
d) Potassium permanganate (KMnO4)
Answer: c) Osmium tetroxide (OsO4)

The reaction of an alkyne with ozone (O3) followed by treatment with a reducing agent results in the formation of:
a) An epoxide
b) An aldehyde
c) A ketone
d) A carboxylic acid
Answer: c) A ketone

Which of the following reagents is commonly used for the conversion of an alkyne to a carboxylic acid?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) Potassium permanganate (KMnO4)
d) Ozone (O3)
Answer: c) Potassium permanganate (KMnO4)

The reaction of an alcohol with a carboxylic acid in the presence of an acid catalyst results in the formation of:
a) An ester
b) A ketone
c) An aldehyde
d) A carboxylic acid cannot react with an alcohol
Answer: a) An ester

Which of the following reagents is commonly used for the conversion of an alcohol to an alkyl halide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of an alcohol with phosphorus tribromide (PBr3) results in the formation of:
a) An ester
b) A ketone
c) An aldehyde
d) An alkyl halide
Answer: d) An alkyl halide

Which of the following reagents is commonly used for the conversion of an alcohol to an alkene?
a) Deuterium oxide (D2O)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: d) Potassium permanganate (KMnO4)

The reaction of a carboxylic acid with an alcohol in the presence of an acid catalyst results in the formation of:
a) An ester
b) A ketone
c) An aldehyde
d) A carboxylic acid cannot react with an alcohol
Answer: a) An ester

Which of the following reagents is commonly used for the conversion of a carboxylic acid to an ester?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of a carboxylic acid with a primary amine results in the formation of:
a) An ester
b) A ketone
c) An amide
d) A carboxylic acid cannot react with a primary amine
Answer: c) An amide

Which of the following reagents is commonly used for the conversion of a carboxylic acid to an amide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: c) Hydrogen peroxide (H2O2)

The reaction of an ester with a primary amine results in the formation of:
a) A carboxylic acid
b) A ketone
c) An amide
d) An ester cannot react with a primary amine
Answer: c) An amide

Which of the following reagents is commonly used for the conversion of an ester to an amide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of a ketone with a primary amine results in the formation of:
a) A carboxylic acid
b) A ketone cannot react with a primary amine
c) An amine
d) An enamine
Answer: c) An amine

Which of the following reagents is commonly used for the conversion of a ketone to an amine?
a) LiAlH4 (lithium aluminum hydride)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) LiAlH4 (lithium aluminum hydride)

The reaction of an amide with a reducing agent such as LiAlH4 (lithium aluminum hydride) results in the formation of:
a) A carboxylic acid
b) A ketone
c) An amine
d) An amide cannot be reduced
Answer: c) An amine

Which of the following reagents is commonly used for the conversion of an amide to an amine?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) LiAlH4 (lithium aluminum hydride)
d) Potassium permanganate (KMnO4)
Answer: c) LiAlH4 (lithium aluminum hydride)

The reaction of an aldehyde or ketone with a Grignard reagent results in the formation of:
a) A carboxylic acid
b) An alcohol
c) An aldehyde
d) A ketone cannot react with a Grignard reagent
Answer: b) An alcohol

Which of the following reagents is commonly used for the conversion of an aldehyde or ketone to an alcohol?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) LiAlH4 (lithium aluminum hydride)
d) Potassium permanganate (KMnO4)
Answer: c) LiAlH4 (lithium aluminum hydride)

The reaction of an alcohol with phosphorus pentachloride (PCl5) results in the formation of:
a) An ester
b) A ketone
c) An alkyl halide
d) A carboxylic acid
Answer: c) An alkyl halide

Which of the following reagents is commonly used for the conversion of an alcohol to an alkyl halide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of an alkyl halide with sodium cyanide (NaCN) results in the formation of:
a) An ester
b) A ketone
c) An amine
d) A nitrile
Answer: d) A nitrile

Which of the following reagents is commonly used for the conversion of an alkyl halide to a nitrile?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Sodium cyanide (NaCN)
Answer: d) Sodium cyanide (NaCN)

The reaction of an alkene with water in the presence of a strong acid catalyst results in the formation of:
a) An alcohol
b) An aldehyde
c) An ether
d) A ketone
Answer: a) An alcohol

Which of the following reagents is commonly used for the conversion of an alkene to an ether?
a) Hydrogen peroxide (H2O2)
b) Sodium borohydride
c) H2SO4 (sulfuric acid)
d) Sodium cyanide (NaCN)
Answer: c) H2SO4 (sulfuric acid)

The reaction of an alcohol with an acid catalyst in the presence of heat results in the formation of:
a) An alkene
b) An aldehyde
c) An ether
d) A ketone
Answer: a) An alkene

Which of the following reagents is commonly used for the conversion of an alcohol to an alkene?
a) Deuterium oxide (D2O)
b) Sodium borohydride
c) H2SO4 (sulfuric acid)
d) Sodium cyanide (NaCN)
Answer: c) H2SO4 (sulfuric acid)

The reaction of an alcohol with an alkyl halide in the presence of a base results in the formation of:
a) An ether
b) A ketone
c) An amine
d) An alcohol cannot react with an alkyl halide
Answer: a) An ether

Which of the following reagents is commonly used for the conversion of an alcohol to an ether?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Sodium cyanide (NaCN)
Answer: a) Thionyl chloride (SOCl2)

The reaction of an amine with an alkyl halide results in the formation of:
a) An ester
b) A ketone
c) An amine cannot react with an alkyl halide
d) An amide
Answer: d) An amide

Which of the following reagents is commonly used for the conversion of an amine to an amide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of an aldehyde or ketone with a Grignard reagent followed by hydrolysis results in the formation of:
a) An alcohol
b) An aldehyde
c) A ketone
d) A carboxylic acid
Answer: d) A carboxylic acid

Which of the following reagents is commonly used for the conversion of an aldehyde or ketone to a carboxylic acid?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: d) Potassium permanganate (KMnO4)

The reaction of an ester with a reducing agent such as LiAlH4 (lithium aluminum hydride) results in the formation of:
a) An alcohol
b) An ester cannot be reduced
c) A ketone
d) A carboxylic acid
Answer: a) An alcohol

Which of the following reagents is commonly used for the conversion of an ester to an alcohol?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) LiAlH4 (lithium aluminum hydride)
d) Potassium permanganate (KMnO4)
Answer: c) LiAlH4 (lithium aluminum hydride)

The reaction of an amide with a reducing agent such as LiAlH4 (lithium aluminum hydride) results in the formation of:
a) An amide cannot be reduced
b) A ketone
c) An amine
d) A carboxylic acid
Answer: c) An amine

Which of the following reagents is commonly used for the conversion of an amide to an amine?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) LiAlH4 (lithium aluminum hydride)
d) Potassium permanganate (KMnO4)
Answer: c) LiAlH4 (lithium aluminum hydride)

The reaction of a carboxylic acid with an alcohol in the presence of an acid catalyst results in the formation of:
a) An ester
b) A ketone
c) An amine
d) A carboxylic acid cannot react with an alcohol
Answer: a) An ester

Which of the following reagents is commonly used for the conversion of a carboxylic acid to an ester?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of a carboxylic acid with a primary amine results in the formation of:
a) An ester
b) A ketone
c) An amide
d) A carboxylic acid cannot react with a primary amine
Answer: c) An amide

Which of the following reagents is commonly used for the conversion of a carboxylic acid to an amide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: c) Hydrogen peroxide (H2O2)

The reaction of an ester with a primary amine results in the formation of:
a) A carboxylic acid
b) A ketone
c) An amide
d) An ester cannot react with a primary amine
Answer: c) An amide

Which of the following reagents is commonly used for the conversion of an ester to an amide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of a ketone with a primary amine results in the formation of:
a) A carboxylic acid
b) A ketone cannot react with a primary amine
c) An amine
d) An enamine
Answer: c) An amine

Which of the following reagents is commonly used for the conversion of a ketone to an amine?
a) LiAlH4 (lithium aluminum hydride)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) LiAlH4 (lithium aluminum hydride)

The reaction of an amine with an acid chloride results in the formation of:
a) An ester
b) A ketone
c) An amide
d) An amine cannot react with an acid chloride
Answer: c) An amide

Which of the following reagents is commonly used for the conversion of an amine to an amide?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: a) Thionyl chloride (SOCl2)

The reaction of an aldehyde or ketone with a reducing agent such as NaBH4 (sodium borohydride) results in the formation of:
a) An alcohol
b) An aldehyde
c) A ketone cannot be reduced
d) A carboxylic acid
Answer: a) An alcohol

Which of the following reagents is commonly used for the conversion of an aldehyde or ketone to an alcohol?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: b) Sodium borohydride

The reaction of an aldehyde or ketone with a strong oxidizing agent such as potassium permanganate (KMnO4) results in the formation of:
a) A carboxylic acid
b) An alcohol
c) A ketone cannot be oxidized
d) An aldehyde
Answer: a) A carboxylic acid

Which of the following reagents is commonly used for the conversion of an aldehyde or ketone to a carboxylic acid?
a) Thionyl chloride (SOCl2)
b) Sodium borohydride
c) Hydrogen peroxide (H2O2)
d) Potassium permanganate (KMnO4)
Answer: d) Potassium permanganate (KMnO4)

 

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