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

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

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

Polysubstitution is a major drawback in

• Friedel Craf t’ s alkylation

• Reimer Tiemann reaction

• FriedelCraft's acylation

• Acetylation of aniline

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

The major product of the following reaction is :

247.

The major product obtained in the given reaction is:

• 

• 

• 

• 

The major product obtained in the given reaction is:

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

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