19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
CH CH C CH
CH CH CH
Acetylenic hydrogens are acidic because
The product A, is (a) (b) (c) (d)
Reduction of 2-butyne with sodium in liquid ammonia gives predominantly :
Among the following, the aromatic comopound is: (a) (b) (c) (d)
Which is not aromatic compound? _
Which of the following sequence of reactions (reagents) can be used for the conversion of C6H5CH2CH3 into C6H5CH=CH2?
The compound X in the reaction, (a) (b) (c) (d)
An aromatic compound ‘X’ with molecular formula C8H10 on nitration gives one mononitro derivative and three dinitro derivatives. Compound ‘X’ would be
Ethylbenzene with bromine in presence of FeBr3, predominantly gives (a) (b) (c) (d)
Product The main product is (a) (b) (c) (d)
Which among the following groups when attached to benzene ring will direct the incoming electrophile predominantly to the meta position? (I) – CH3 (II) –CH2Cl (III) (IV) –CCl3 (V) –NHCOCH3
Select the true statement about benzene amongst the following
For the formation of toluene by Friedal Craft reaction, reactants used in presence of anhydrous AlCl3 are
Assertion: The addition of HBr on 2-butene gives two isomeric products. Reason: Addition of HBr on 2-butene follows Markownikoff’s rule.
Assertion:1-butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane. Reason: It involves the formation of a primary radical.
Assertion: Alkynes are more reactive towards nucleophilic addition reaction as compared to alkenes. Reason: Alkynes contain two pi bonds, while alkenes have only one bond.
Assertion: Friedel-Craft’s reaction is used to introduce an alkyl or acyl group in the benzene nucleus. Reason: Benzene is a solvent for Friedel-Craft’s alkylation of bromobenzene.
Assertion: Rates of nitration of benzene and hexadeuterobenzene are different. Reason: The C—H bond is stronger than the C—D bond.
Assertion: Alkyl benzene is not prepared in good yield by Friedel-Craft’s alkylation of benzene. Reason: Alkyl halides are less reactive than acyl halides.
Hydrocarbons are classified depending upon the types of ...A... bonds present. Here, A refers to
Aromatic compounds are
Which of the following is correct IUPAC name of given hydrocarbon?
The IUPAC name of CH CH CH is