Chemistry Question Bank

Which of the following is antiaromatic?

The kind of delocalisation involving sigma bond orbitals is called

Which of the following represents the case of hyperconjugation? (a) (b) (c)

Hyperconjugation occurs in (a) (b) (c)

Hyperconjugation occurs in (a) CH CH (b) CH CH CH (c) CH CH CH

How many hyperconjugable H-atoms does this molecule has?

GENERAL ORGANIC CHEMISTRY Canonical structures due to hyperconjugation in this molecule can be written as (a) (b)

Compare acidic strength:

Among these, I is the chain isomer of

Among these III is the chain isomer of

Among these functional 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, positional isomers are

These two conformers exist in a state of dynamic equilibrium. Which one is more stable?

The IUPAC name of is (AIPMT 2006)

The number of isomeric alkenes with molecular formula C6H12 are (PMET 2006)

Which of the following compounds will not exhibit cis-trans isomerism ? (PMET 2006) (a) (b) (c) (d)

For (i) I–, (ii) Cl–, (iii) Br–, the increasing order of nucleophilicity would be (AIPMT 2007)

Which of the following represents the correct order of the acidity in the given compounds ? (AIPMT 2007)

Geometrical isomers differ in (PMET 2007)

In the hydrocarbon, the state of hybridisation of carbons1, 3 and 5 are in the following sequence (AIPMT 2008)

IUPAC name of (PMET 2008)

Inductive effect involves (AFMC 2008)

Which of the following is most basic ? (CPMT 2008)

The stability of carbanions in the following (I) RC C Θ (II) (III) R C CH Θ (IV) R C CH Θ is in the order of (AIPMT 2008)