Free MCQs & Online Quiz Practice for Exams

Q: Methanal + CH₃MgBr gives (2016 ETEA)

A) CH₃CH₂OH

B) CH₃OH

C) Manganese

D) Iodine

Q: Primary amines on treatment with alkyl halides yield (2016 ETEA)

A) Secondary amine

B) Tertiary amine

C) Quaternary amine

D) Mixture of a,b,c

Q: Which is NOT true about Grignard reagent? (2016 ETEA)

A) Highly reactive

B) Very stable and easily isolated

C) Synthetic importance

D) General formula RMgX

Q: KOH (alcoholic) + CH(CH₃)₂CH₂Br undergoes (2017 ETEA)

A) Nucleophilic substitution

B) Elimination

C) Nucleophilic addition

D) None

Q: OH⁻ (alcoholic) + CH(CH₂)₂Br → product; nature of OH⁻ is (2017 ETEA)

A) Nucleophile

B) Lewis base

C) Ligand

D) All

Q: In Wurtz synthesis alkyl halide reacts with sodium; solvent used is (2017 ETEA)

A) Water

B) Alcohol

C) Pyridine

D) Ether

Q: In OH⁻ + C₂H₅–I → CH₃CH₂–OH + I⁻, substrate is (2018 ETEA)

A) OH⁻

B) CH₃CH₂OH

C) I⁻

D) CH₃CH₂I

Q: Amine most reactive towards HI (2018 ETEA)

A) Diethyl methyl amine

B) Dimethyl amine

C) Methyl propyl amine

D) Butyl amine

Q: (CH₃)₃C–CH₂Br cannot undergo elimination with alcoholic KOH because (2018 ETEA)

A) Alcoholic KOH not good

B) Tertiary alkyl halide

C) Strong base needed

D) No β-hydrogen

Q: Bromoethane + KCN gives X; reduction of X gives (2018 ETEA)

A) CH₃CH₃

B) CH₃CH₂CH₂NH₂

C) CH₃CH₂COOH

D) CH₃CH₂CH₂NO₂

Q: Aqueous KOH causes SN; attacks easiest on (2018 ETEA)

A) CH₃CH₂Cl

B) CH₃CH₂Br

C) CH₃CH₂F

D) CH₃CH₂I

Q: 2-bromopropane + C₂H₅S⁻ undergoes (2018 ETEA)

A) Elimination

B) Substitution

C) No reaction

D) Addition

Q: Fastest reacting pair (2018 ETEA)

A) CH₃I + F₂

B) CH₃Cl + F₂

C) CH₃Br + Cl₂

D) CH₃F + I₂

Q: During SN2 mechanism nucleophile attacks (2019 ETEA)

A) When C–X bond broken

B) Before C–X bond broken

C) When C–H bond broken

D) After carbocation formation

Q: Alkyl halides reactive to nucleophile because (2019 ETEA)

A) Ionic nature

B) Non-polar C–X bond

C) Nucleophilic carbon and bad LG

D) Electrophilic carbon and good LG

Q: Most soluble in water (2019 ETEA)

A) Secondary amines

B) Tertiary amines

C) Quaternary amines

D) All insoluble

Q: Alkyl halide with highest reactivity (2019 ETEA)

A) R–F

B) R–Cl

C) R–Br

D) R–I

Q: Stronger nucleophile? (2019 ETEA)

A) C₂H₅O⁻

B) C₂H₅S⁻

C) Both equal

D) None

Q: Highest boiling point (2019 ETEA)

A) Methyl chloride

B) Methyl iodide

C) Methyl bromide

D) Both a and b

Q: Mechanism where C–X breaks and C–Nu forms simultaneously (2020 ETEA)

A) SN1

B) SN2

C) E1

D) E2