Chemistry Question Bank

Which of the following is the most stabilized carbocation? (a) (b) (c) (d)

Which carbocation is the most stabilized? (a) (b) GENERAL ORGANIC CHEMISTRY (c) (d)

Assertion: Tropylium cation is more stable than Reason: It is stabilized by both resonance effect and inductive effect.

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.

Arrange the following free radicals in order of decreasing stability. Methyl (I), Vinyl (II), Allyl (III), Benzyl (IV)

Which among the following free radicals is most stable? (a) (b) (c) (d) GENERAL ORGANIC CHEMISTRY

Negative inductive effect is shown by

F COOCH COCl I II III 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)

Which of these groups has –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 the following has minimum-I-effect?

Which of the groups has highest + I effect?

In the following benzyl/allyl system (R is alkyl group) decreasing order of inductive effect is

III II I CH CH CH C CH Which of these groups has +I effect ?

Polarisation of electrons in acrolein may be written as (a) (b) (c) (d)

Electromeric effect is

Resonance structure of a molecules should have

Which of the following statements is true about this molecule ?

Among these compounds, which one has shortest C—Cl bond?

The stability order of these canonical structures is

GENERAL ORGANIC CHEMISTRY The most stable canonical structure among these is

The most unlikely representation of resonance structure of p–nitrophenoxide ion is: (a) (b) (c) (d)

Which of the following is least stable?

Mesomeric effect involves delocalisation of