19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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 ->
The pair of electrons in the given carbanion, CH3C≡C–, is present in which of the following orbitals? (NEET-I 2016)
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 (…
With respect to the conformers of ethane, which of the following statements is true? (NEET 2017)
The compound that will react most readily with gaseous bromine has the formula (NEET 2017) (a) C H (b) C H (c) C H (d) C H
In which of the following molecules, all atoms are coplanar? (NEET-II 2016) (a) (b) (c) (d)
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?
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 …
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 is the most suitable reagent among the following to distinguish compound (3) from rest of the
CH C C CH
CH CH CH CH
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? _
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.