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.
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Read the Alkyl Halides notesFree MDCAT chapter notes with key terms458 questions · page 12 of 23
- A. C-I
- B. C-H
- C. C-Cl
- D. C-F
Explanation: C-F bond has the highest bond energy value.
Correct answer: C-F- A. Amino to the carboxyl group
- B. Carboxyl to an amino group
- C. Carboxyl group only
- D. Amino group only
Explanation: A zwitterion is a dipolar ion that is formed on the combination of a carboxyl group and an amino group.
Correct answer: Carboxyl to an amino group- A. CH3 − CH2 − Cl
- B. CH3 − CH2 − Br
- C. CH3 − CH2 − F
- D. CH3 − CH2 − I
Explanation: Iodide ion is a very good leaving group due to low bond energy so the attack of KOH(aq) to proceed SN reaction and hence it can be easily…
Correct answer: CH3 − CH2 − I- A. Dehydration
- B. Protonation
- C. Ionization
- D. Attack of nucleophile and departure of leaving group
Explanation: Ionization is correct as in SN1 reaction a carbocation is formed in the first step the tertiary alcohol is ionized.
Correct answer: Ionization- A. vinegar
- B. tomato
- C. kerosene
- D. none of above
Explanation: The correct answer is a) vinegar. The odor of acetic acid resembles that of vinegar, and it is often associated with the sour taste and…
Correct answer: vinegar- A. C6H5NHS
- B. C6H5COCl
- C. C6H5CN
- D. C6H5-C=S-NH2
Explanation: This is the correct product. Complete reaction is given below:
Correct answer: C6H5CN- A. (I) < (IV) < (II) < (III)
- B. (I) < (III) < (IV) < (II)
- C. (III) < (I) < (II) < (IV)
- D. (III) < (I) < (IV) < (II).
Explanation: Stability of any compound is inversely proportional to their reactivity. The less stable diazonium salt will be more reactive.
Correct answer: (I) < (III) < (IV) < (II)- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Aliphatic and aromatic primary amines react with CHCl3 and KOH to give a foul smelling isocyanides.
Correct answer: Option A- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: When an amide is treated with bromine in an aqueous or ethanolic solution of sodium hydroxide, degradation of amide takes place leading to…
Correct answer: Option C- A. Schiff's base
- B. Carbylamine
- C. Immine
- D. None of these
Explanation: A Schiff's base is a compound derived from the condensation reaction between an amine (such as aniline) and a carbonyl compound (such as…
Correct answer: Schiff's base- A. NH2
- B. SnCl2
- C. Cl
- D. NH4+Cl−
Explanation: Nitro compmounds on catalytic of chemical reduction gives primary amines. Nitroarenes are reduced to primary amine arene.
Correct answer: NH2- A. Benzene
- B. Nitro benzene
- C. Toluene
- D. Chloro benzene
Explanation: Addition of nitro group to a compound is called nitration. The reactivity of benzene derivatives towards nitration depends on the presence…
Correct answer: Nitro benzene- A. 2CH3NH2 + CH3COOH
- B. 2CH3OH + CH3COOH
- C. (CH3)2NH + CH3COOH
- D. (CH3)2NCOOH + CH4
Explanation: When (CH3)2NCOCH3 is refluxed with acid, it undergoes hydrolysis to form 2(CH3)NH2 + CH3COOH. The reaction proceeds as follows: 1.
Correct answer: (CH3)2NH + CH3COOH234. Which one of the following compound when heated with KOH and primary amines give carbylamine test:
- A. CHCl3
- B. CH3Cl
- C. CCl4
- D. CH3NC
Explanation: When employed as a test, the carbylamine's reaction is also known as Hofmann's isocyanide test.
Correct answer: CHCl3- A. Hinsberg's reagent
- B. Grignard's reagent
- C. Fehling's solution
- D. Tollen's reagent
Explanation: Hinsberg reagent C6H5SO2Cl reacts with primary amines and gives alkali soluble benzene sulphonamide; with secondary amine it gives alkali…
Correct answer: Hinsberg's reagent- A. Ethyl cyanide
- B. Ethylamine
- C. Methylamine
- D. Acetamide
Explanation: Ethylamine react with HNO2 to form ethanol which on addition of PCl5 gives ethyl chloride.
Correct answer: Ethylamine237. Which of the following compounds gives carbylamine when heated with chloroform and alcoholic potash:
- A. Aldehyde
- B. Primary amine
- C. Secondary amine
- D. Phenol
Explanation: The Carbylamine test, also known as the Isocyanide test, is used to distinguish primary amines from other types of amines (secondary and…
Correct answer: Primary amine- A. pyridine
- B. piperidine
- C. methyl amine
- D. dimethyl amine
Explanation: The correct basicity order of the following compounds is Dimethyl amine > Methyl amine > Piperidine > Pyridine.
Correct answer: pyridine- A. 5
- B. 3
- C. 4
- D. None of these
Explanation: When primary amide reacts with Br and NaOH then one carbon less resulted amine has formed.
Correct answer: 3- A. A is NaNo2 and B is Br2 + KOH
- B. A is NH3 and B is LiAlH4
- C. A is LiAlH4 and B is NH3
- D. A is KOH and X is CH3CHO
Explanation: When benzoyl chloride heated with ammonia then benzoyl amide is formed which on reduction with LiAlH4, Primary amine is formed.
Correct answer: A is NH3 and B is LiAlH4