Free Alkyl Halides MCQs with Answers
458 Alkyl Halides MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
Last updated
Read the Alkyl Halides notesFree MDCAT chapter notes with key terms458 questions · page 6 of 23
- A. Methane
- B. Ethane
- C. Methanol
- D. Ethanol
Explanation: The chemical Formula for Halothane is F3CCHBRCI, which is a derivative of the chemical formula of Ethane (C2H6).
Correct answer: Ethane- A. H+
- B. NH3
- C. NO2+
- D. Br-
Explanation: Since ammonia is nucleophilic, it attacks the electropositive carbon and causes the Br- ion to leave, this allows for the formation of…
Correct answer: NH3- A. Propene
- B. Ether
- C. Aldehyde
- D. Ester
Explanation: In the elimination reaction involving 2-bromopropane and hydroxide ions.
Correct answer: Propene- A. Propagation
- B. Free radical substitution
- C. Addition
- D. Elimination
Explanation: Halogenation of alkanes means the substitution of a halogen atom(s) by the removal of one or more hydrogen atoms in the alkane.
Correct answer: Free radical substitution- A. I < II < III < IV
- B. III < I < IV < II
- C. III < I < II < IV
- D. II < IV < I < III
- E. I < III < II < IV
Explanation: The reactivity of alkyl halides towards SN2 depends on:(i) Degree of C-atoms Reactivity Order:1°>2°>3°(ii)More good the leaving group more…
Correct answer: III < I < IV < II- A. ZnCl2
- B. KMnO4
- C. AlCl3
- D. V2O5
Explanation: Anhydrous Aluminum Chloride is the catalyst used in the Friedel-craft reaction.
Correct answer: AlCl3- A. Electrophilic carbon
- B. Nucleophilic carbon
- C. Beta-hydrogen
- D. None of these options is correct
Explanation: In a reaction having both alkyl halide and base, the base will attack the beta-hydrogen.
Correct answer: Beta-hydrogen- A. Position isomers
- B. Chain isomers
- C. Functional group isomers
- D. Metamers
Explanation: 1-chloropropane and 2-chloropropane are positional isomers.Positional isomers have the same functional group (reactive group of…
Correct answer: Position isomers- A. Br+
- B. Br-
- C. Br
- D. Cl2
Explanation: Br is a free radical. Bromine atoms have single unpaired electrons, then we call them bromine free radicals - or more usually just bromine…
Correct answer: Br- A. Substitution reaction
- B. Elimination reaction
- C. Addition reaction
- D. None of these
Explanation: Correct option is A.When an alkyl halide (haloalkane) reacts with KOH (potassium hydroxide) in water, the reaction that typically takes…
Correct answer: Substitution reaction- A. Alkyl Halide
- B. Acetamide
- C. Ester
- D. Anhydride
Explanation: Correct option is A.Alkyl halide is not a derivative of carboxylic acid.
Correct answer: Alkyl Halide- A. CH3CN
- B. CH3Na
- C. CH3CH2NH2
- D. None of these
Explanation: Correct option is B.This is a double replacement reaction which occurs when two cations or anions switch places in a reaction to form new…
Correct answer: CH3Na113. Neopentyl halide is:
- A. Primary alkyl halide
- B. None of these
- C. Secondary alkyl halide
- D. Tertiary alkyl halide
Explanation: A neopentyl halide is a primary alkyl halide because the carbon attached to the halide is connected to one other carbon and two…
Correct answer: Primary alkyl halide- A. Addition
- B. Electrophilic substitution
- C. Nucleophilic substitution
- D. Oxidation
Explanation: Alkyl halides undergo nucleophilic substitution reaction because the alkyl halide (electrophile) bonds with a nucleophile that replaces…
Correct answer: Nucleophilic substitution- A. Tertiary alkyl halides
- B. Secondary alkyl halides
- C. None of these
- D. Primary alkyl halides
Explanation: Primary alkyl halides undergo SN2 reactions the fastest, then secondary alkyl halides and then tertiary alkyl halides.
Correct answer: Primary alkyl halides- A. Nucleic acids
- B. Amino acids
- C. Lipids
- D. Carbohydrates
Explanation: The Strecker synthesis is used to produce amino acids by adding cyanide ions to an amine and then using acid hydrolysis to give an amino…
Correct answer: Amino acids- A. SN1
- B. E1
- C. Free radical substitution reaction
- D. SN2
Explanation: SN2 reactions are nucleophilic substitution reactions in which the rate-determining step involves two chemical species, hence they are…
Correct answer: SN2- A. SN2 and E2
- B. SN1 and SN2
- C. SN1 and E2
- D. SN1 and E1
Explanation: SN2 (bimolecular substitution) and E2 (bimolecular elimination) reactions both have one step only.
Correct answer: SN2 and E2- A. Nucleophilic addition
- B. Nucleophilic substitution
- C. Electrophilic substitution
- D. Electrophilic addition
Explanation: An alkyl halide is formed by nucleophilic substitution. A nucleophile is a negatively charged species and therefore helps in substitution…
Correct answer: Nucleophilic substitution- A. Elongation
- B. Initiation
- C. Termination
- D. Propagation
Explanation: Alkanes perform free radical substitution reaction which is composed of three steps:1. INITIATIONCl2 --U.V--> 2Cl °2.
Correct answer: Termination