19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
These two conformers exist in a state of dynamic equilibrium. Which one is more stable?
Among these, positional isomers are
I. CH CH CH CH CH II. CH CH CH CH | CH III. CH | CH C CH | CH Among these, chain isomers are
Among these functional isomers are
Among these III is the chain isomer of
Among these, I is the chain isomer of
Compare acidic strength:
Assertion: Cyclopentadienyl anion is much more stable than allyl anion. Reason: Cyclopentadienyl anion is aromatic in character.
Which among the following statements are true with respect to electronic displacement in a covalent bond ? (1) Inductive effect operates through pi bond (2) Resonance effect operates through sigma bond (3) Inductive e…
In which of the following molecule the resonance effect is not present? (a) (b) (c) (d)
Mesomeric effect involves delocalisation of
Which of the following is least stable?
The most unlikely representation of resonance structure of p–nitrophenoxide ion is: (a) (b) (c) (d)
GENERAL ORGANIC CHEMISTRY The most stable canonical structure among these is
The stability order of these canonical structures is
CH CH
Arrange the following in increasing order of stability. (NEET 2013) 1. CH C CH CH 2. CH C 3. CH CH
Which of the following carbocation is least stable? (a) (b) CH CH (c) CH CH CH (d)
Structure of the compound whose IUPAC name is 3- ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is (NEET 2013) (a) (b) (c) (d)
What is the correct order of stability of the given cations: CH3CHCHCH3 H3C OH 3-methyl-2-butanol 3 2 1 GENERAL ORGANIC CHEMISTRY
The structure of isobutyl group in an organic compound is (NEET 2013)
Which nomenclature is not according to IUPAC system? (AIPMT 2012) (a) (b) (c) (d)
Among these functional isomers are
Most stable carbocation is (a) (b) (c) (d)
CH CH CH CH HC C III II I Which of the following orders is correct for the stability of these carbanions ?