The major product obtained in the given reaction is: from Chemis

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241.

The reactivity of alkyl bromides.

 

Towards iodide ion in dry acetone decrease in the order

  • V > I > II > III

  • I > IV> II> III

  • III> II> I> I

  • III > II > IV > I


242.

Optically active CH3—CH2—CHOH—CH3 was found to have lost its optical activity after standing in water containing a few drops of acids, mainly due to the formation of 

  • CH3—CH2—CH=CH2

  • CH3—CH=CH—CH3

  • CH3—CH(CH3)—CH2—OH

  • CH3—CH2—CH2—CH2—OH


243.

Which one of the following alkenes when treated with HCl yields majority an anti Maxkovnikov product?

  • CH3O-CH=CH2

  • Cl-CH=CH2

  • F3C-CH=CH2

  • H2N-CH=CH2


244.

Polysubstitution is a major drawback in

  • Friedel Craf t’ s alkylation

  • Reimer Tiemann reaction

  • FriedelCraft's acylation

  • Acetylation of aniline


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245.

The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is :

              

  • III < I <II

  • III< II<I

  • I< III< II

  • II< I < III


246.

The major product of the following reaction is :

  


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247.

The major product obtained in the given reaction is:


A.

Friedal craft’s alkylation:


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248.

The major product obtained in the given reaction is:


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249.

The major product ‘Y’ in the following reaction is :


250.

The correct statement regarding the comparison of staggered and eclipsed conformations of ethane is

  • The eclipsed conformation of ethane is more stable than staggered conformation because eclipsed conformation has no torsional strain

  • The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has torsional strain

  • The staggered conformation of ethane is more stable than eclipsed conformation because staggered conformation has no torsional strain

  • The staggered conformation of ethane is more stable than eclipsed conformation because staggered conformation has no torsional strain

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