19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Product The main product is (a) (b) (c) (d)
The compound X in the reaction, (a) (b) (c) (d)
Among the following, the aromatic comopound is: (a) (b) (c) (d)
The product A, is (a) (b) (c) (d)
Acetylenic hydrogens are acidic because
CH CH CH CH
CH C C CH
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.
Which is the most suitable reagent among the following to distinguish compound (3) from rest of the
CH CH C CH
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: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: The addition of HBr on 2-butene gives two isomeric products. Reason: Addition of HBr on 2-butene follows Markownikoff’s rule.
For the formation of toluene by Friedal Craft reaction, reactants used in presence of anhydrous AlCl₃ are
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
Ethylbenzene with bromine in presence of FeBr₃, predominantly gives (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
Which of the following sequence of reactions (reagents) can be used for the conversion of C₆H₅CH₂CH₃ into C₆H₅CH=CH₂?
Which is not aromatic compound? _
Reduction of 2-butyne with sodium in liquid ammonia gives predominantly :
CH CH CH
A hydrocarbon A on chlorination gives B which on heating with alcoholic potassium hydroxide changes into another hydrocarbon C. The latter decolourises Baeyer's reagent and on ozonolysis forms formaldehyde only. A is
In the presence of platinum catalyst, hydrocarbon A adds hydrogen to form n-hexane. When hydrogen bromide is added to A instead of hydrogen, only a single bromo compound Is formed. Which of the following is A? (a) CH …
When 3, 3-dimethyl 2-butanol is heated with H₂SO₄, the major product obtained is
When hydrochloric acid gas is treated with propene in presence of benzoyl peroxide, it gives.