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 ->
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
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.
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 (…
Which of the following statements is true ?
Consider the below reaction and identify the missing reagent/chemical (NEET 2021) + NaOH + ? CH CH COO Na Heat CH CH Na CO ->
The major product formed in dehydrohalogenation reaction of 2-Bromopentane is pent-2-ene. This product formation is based on (NEET 2021)
Which of the following has minimum-I-effect?
Which of these groups has –I effect?
Inductive effect of Cl atom operates in (a) CH CH CH Cl (b) CH CH CH CH Cl (c)
F COOCH COCl I II III Which of these groups has –I effect?
Negative inductive effect is shown by
Which among the following free radicals is most stable? (a) (b) (c) (d) GENERAL ORGANIC CHEMISTRY
Arrange the following free radicals in order of decreasing stability. Methyl (I), Vinyl (II), Allyl (III), Benzyl (IV)
Assertion: Tertiary carbocations are generally formed more easily than primary carbocations. Reason: Hyperconjugation as well as inductive effect due to additional alkyl groups stabilize tertiary carbocations.
Assertion: NF is a weaker ligand than N CH . Reason: NF ionizes to give Fions in aqueous solution.
Which of the following represents the correct order of the acidity in the given compounds ?
Hybridisation states of C in + CH and CH are (a) sp & sp
Which of the following orders is correct for the stability of these carbocations ?
Which of the following compounds possesses the C—H bond with the lowest bond dissociation energy?
The IUPAC name of the following compound is
The incorrect IUPAC name is (a) (b) (c) (d)
IUPAC name of is
The correct structure of 4-bromo-3-methyl but-1-ene is
Ethanol and dimethyl ether are