19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Polarisation of electrons in acrolein may be written as (a) (b) (c) (d)
III II I CH CH CH C CH Which of these groups has +I effect ?
In the following benzyl/allyl system (R is alkyl group) decreasing order of inductive effect is
Which of the groups has highest + I effect?
Which of the following has minimum-I-effect?
The arrangement of (CH3)3C—, (CH3)2CH—, CH3CH2 — when attached to benzene or unsaturated group in increasing order of inductive effect is GENERAL ORGANIC CHEMISTRY
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: Tropylium cation is more stable than Reason: It is stabilized by both resonance effect and inductive effect.
Which carbocation is the most stabilized? (a) (b) GENERAL ORGANIC CHEMISTRY (c) (d)
Which of the following is the most stabilized carbocation? (a) (b) (c) (d)
What is the decreasing order of stability (most stable ->least stable) of the following carbocations?
Rearrangement in this carbocation will produce (a) (b)
Rearrangement in this carbocation will produce (a) GENERAL ORGANIC CHEMISTRY (b)
Which of the following carbocations will be most stable? (a) Ph C (b) CH CH (c) (CH ) CH (d) CH CH CH
Most stable carbonium ion is (a) C H (b) (CH ) C (c) (C H ) C (d) C H CH
Which of the following statements is correct about methyl group?
Consider the following carbocations, (I) C H CH (II) C H CH CH (III) C H CHCH (IV) C H C CH The correct sequence of the stability of these is
Which of the following orders is correct for the stability of these carbanions ?
Consider the following carbocations (I) Cl3C+ (II) Cl2CH+ (III) ClCH (IV) CH The stability sequence follows the order