Mechanism Test ...

Point out the incorrect statement about resonance?

Which of the following ions is the most resonance stabilised?

Hyperconjugation is

The number of hyperconjugating structures shown by the carbocations are given below. Which one is not correctly matched?

In which of the following species hyperconjugation is possible?

Answer the following question based on the given paragraph.
Stability of carbocation, alkylfree radical and alkene can be explained on the basis of hyperconjugation.
In all these cases, there is presence ofhydrogen atom at theadjacent carbon atom ofsp² hybridised carbon atom. Total number of hyperconjugating structures depends upon the number of hydrogen atoms present at adjacent carbon atom of sp² C-atom.
More the hyperconjugating structures, more is the stabihty of the ion.

Decreasingorder of stabilityof following alkenes is
(i) CH₃ - CH = CH₂
(ii) CH₃ - CH = CH - CH₃
(iii) 
(iv) 

Which of the following alcohols on dehydration gives most stable carbocation? 

Which of the following contains three pairs of electrons in valence shell?

Stability of alkyl carbocations can be explained by

In the given reaction two products are expected.

The product (B) is formed as a major product because