Rearrangements in Organic Chemistry

Base catalysed rearrangement of alpha-halo ketone to carboxylic acid derivatives is called as

• Favorskii rearrangement

• Stevens rearrangement

• Wittig rearrangement

In Stevens rearrangement, quaternary ammonium salt reacts with aq.NaOH to form

• primary amine

• secondary amine

• tertiary amine

In the Claisen rearrangement, allyl aryl ethers form

• o-allyl phenol

• p-allyl phenol

• m-allyl phenol

Thermal isomerization of 1,5-dienes by a 3,3-sigmatropic shift is known as

• Wittig rearrangement

• Fries rearrangement

• Cope rearrangement

An organic reaction in which two or more molecules combine to form a larger molecule is called

• Elimination reaction

• Addition reaction

• Substitution reaction

Addition reaction of alkenes usually give

• cis-addition products

• cis- or trans-addition products

• trans-addition products

Addition of HBr to ethylene forms

• ethyl bromide

• propyl bromide

• butyl bromide

According to Markownikoff's rule the negative end of the reagent goes to the carbon atom containing ------- number of hydrogen atoms

• more

• lesser

• equal

The addition of HBr to unsymmetrical alkenes in presence of a peroxide gives a ------- product

• Markownikoff

• anti-Markownikoff

Alkenes can be easily hydroxylated using

• CCl4

• H2O2

• KMnO4