19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
CH CH CH
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.
The reagent is Reagent R CH CCl R R C C R →
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?
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 →
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
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)…
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 of the following statements is true ?
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.
Select the true statement about benzene amongst the following
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)
Acetylenic hydrogens are acidic because
CH CH C CH
CH CH CH CH
CH C C 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)
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.