19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
CH CH CH CH
Which is the most suitable reagent among the following to distinguish compound (3) from rest of the
The product A, is (a) (b) (c) (d)
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
Which of the following statements is true ?
Match the column I with column II and mark the appropriate choice. Column I Column II (A) n-butane 2-methylpropane (i) Free radical substitution (B) hv CH Cl CH Cl → (ii) Wurtz reaction (C) RCOONa + soda lime RH (iii)…
In the given reactions : Br Na,ether Na,ether (i)CH Br X Y Z hv Br NaOH NaOH (ii)CH COOH X Y Z CaO hv → → → → → → Identify X, Y and Z. X Y Z
Which one of the following reactions is expected to readily give a hydrocarbon product in good yields? (a) Electrolytic RCOOK oxidation → (b) Br₂ RCOO Ag → (c) Br₂ RCOO Ag →
Consider the following statements : A hydrocarbon of molecular formula C₅H₁₀ is a I. monosubstituted alkene II. disubstituted alkene III. trisubstituted alkene Which of the following statement(s) is(are) correct?
The reagent is Reagent R CH CCl R R C C R →
When hydrochloric acid gas is treated with propene in presence of benzoyl peroxide, it gives.
When 3, 3-dimethyl 2-butanol is heated with H₂SO₄, the major product obtained 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 …
CH CH CH
Reduction of 2-butyne with sodium in liquid ammonia gives predominantly :
Which is not aromatic compound? _
Which of the following sequence of reactions (reagents) can be used for the conversion of C₆H₅CH₂CH₃ into C₆H₅CH=CH₂?
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)
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
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.
Which of the following compounds possesses the C—H bond with the lowest bond dissociation energy?