JEE Main · Chemistry
Haloalkanes and haloarenes
24 practice questions, each with the answer and an explanation.
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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 24 questions
- What is the stereochemical outcome when optically pure (2R)-2-bromobutane undergoes an nucleophilic substitution reaction with aqueous hydroxide ion ()?
- Which of the following alkyl halides reacts FASTEST via an nucleophilic substitution mechanism?
- The reaction of an alkyl chloride with sodium iodide in dry acetone to prepare an alkyl iodide is known by which name?
- Why does the reaction of an alkyl halide with alcoholic potassium cyanide () predominantly yield an alkyl cyanide (), whereas with silver cyanide () it yiel…
- When 2-bromobutane is heated with alcoholic potassium hydroxide (), what is the major organic alkene product according to Saytzeff's rule?
- Which of the following factors is primarily responsible for the extremely low reactivity of chlorobenzene toward nucleophilic substitution compared to chloroethane?
- The introduction of which substituent at the ortho and para positions of chlorobenzene dramatically enhances its reactivity toward nucleophilic aromatic substitution ()?
- In the preparation of a Grignard reagent (), why must all reagents and reaction vessels be kept rigorously anhydrous (free of water)?
- What is the commercial name and chemical identity of the chlorofluorocarbon refrigerant Freon-12?
- Which of the following alkyl halides undergoes solvolysis via an mechanism at the highest rate in aqueous ethanol?
- What is the major product formed when chlorobenzene is treated with methyl chloride in the presence of anhydrous (Friedel-Crafts alkylation)?
- Treatment of 1-bromobutane with sodium nitrite () in dimethylformamide (DMF) solvent produces predominantly which organic compound?
- Which of the following solvents is a polar aprotic solvent that substantially accelerates substitution reactions by leaving nucleophilic anions unencumbered by hydrogen bonding?
- When chloroform () is exposed to air and light over time, it slowly undergoes atmospheric oxidation to form which highly toxic, poisonous gas?
- What is the major organic product obtained from the reaction of bromobenzene with metallic sodium in dry ether (Fittig reaction)?
- In the dehydrohalogenation of 2-bromopentane using a bulky, sterically hindered base such as potassium tert-butoxide (), what is the major alkene formed?
- Which of the following compounds is an allylic halide?
- What is the structural relationship between (2R,3R)-tartaric acid and (2R,3S)-tartaric acid?
- Which of the following reagents is the most effective and convenient for converting an alcohol into an alkyl chloride with high purity, because both byproducts are gaseous and escape spontaneously?
- The chemical compound -dichlorodiphenyltrichloroethane (DDT) is prepared industrially by the condensation of chlorobenzene with which substance in the presence of concentrated …
- Which of the following haloalkanes has the highest boiling point?
- What is the total number of optical stereoisomers (enantiomers plus meso forms) for 2,3-dichlorobutane?
- Which of the following compounds gives a positive haloform test (yellow precipitate of ) when warmed with and aqueous ?
- What is the product obtained when ethyl bromide is treated with silver nitrite () in aqueous ethanol?