JEE Main · Chemistry
Hydrocarbons and reaction mechanisms
25 practice questions, each with the answer and an explanation.
Practise Hydrocarbons and reaction mechanisms now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 25 questions
- What is the major product obtained when propene is treated with in the presence of benzoyl peroxide?
- Which of the following carbocations is the most thermodynamically stable due to maximum hyperconjugative and resonance stabilization?
- Ozonolysis of an alkene followed by reductive workup with yields equal equimolar amounts of propanone (acetone) and ethanal (acetaldehyde). What is the IUPAC name of the alkene?
- According to Hückel's aromaticity rule, which of the following species is non-aromatic or anti-aromatic rather than aromatic?
- When propyne is passed into warm dilute in the presence of at (Kucherov reaction), what is the final organic product?
- In the conformational analysis of n-butane about the C2-C3 single bond, which conformation possesses the lowest potential energy (highest thermodynamic stability)?
- What is the major monobrominated product obtained from the free-radical bromination of 2-methylpropane (isobutane) with under UV light?
- Which of the following compounds exhibits the greatest acidic character and reacts readily with sodium amide () to release ammonia gas?
- In the Friedel-Crafts alkylation of benzene with 1-chloropropane in the presence of anhydrous , what is the major organic product formed?
- Birch reduction of benzene using sodium in liquid ammonia containing ethanol as a proton donor produces which of the following hydrocarbons?
- Which substituent on a benzene ring acts as a deactivating group yet directs an incoming electrophile to ortho and para positions?
- Addition of molecular bromine () to trans-but-2-ene in solvent proceeds via anti-addition through a cyclic bromonium ion intermediate. What is the stereochemical outcom…
- Which of the following alkynes will yield a red precipitate of cuprous acetylide when treated with ammoniacal cuprous chloride ()?
- What is the catalyst used in the Ziegler-Natta polymerization of ethene to produce high-density polyethylene (HDPE)?
- In the reaction of an alkene with diborane () followed by alkaline hydrogen peroxide (), the net transformation corresponds to which of the following?
- What is the order of reactivity of the hydrogen halides toward addition to an alkene?
- Heating sodium ethanoate () with solid soda-lime () in a 3:1 ratio produces which gas?
- Which of the following compounds will produce only a single monochloro derivative upon free-radical chlorination with ?
- Treatment of benzene with a mixture of concentrated and concentrated at produces nitrobenzene. What is the active electrophile in this reaction?
- Which of the following statements correctly explains why toluene (methylbenzene) undergoes electrophilic nitration roughly 25 times faster than benzene?
- When but-2-yne is hydrogenated over Lindlar's catalyst ( poisoned with lead acetate and quinoline), which product is selectively formed?
- What is the primary thermodynamic driving force that makes aromatic compounds resistant to addition reactions, favoring substitution reactions instead?
- Which of the following reactions can be used to convert an alkyl halide into an alkane containing double the number of carbon atoms?
- What is the IUPAC name for the hydrocarbon ?
- Which of the following compounds has a non-zero dipole moment despite having polar bonds?