List of practice Questions

What are the necessary conditions for any system to be aromatic?

Why is Wurtz reaction not preferred for the preparation of alkanes containing odd number of carbon atoms? Illustrate your answer by taking one example

Why does benzene undergo electrophilic substitution reactions easily and nucleophilic substitutions with difficulty?

How would you convert the following compounds into benzene? 

1. Ethyne
2. Ethene
3. Hexane

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, E⁺

1. Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene 
2. Toluene, p-H₃C-C₆H₄-NO₂, p-O₂N-C₆H₄-NO₂.

Out of benzene, m-dinitrobenzene and toluene which will undergo nitration most easily and why?

Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.

Explain why the following systems are not aromatic?

How will you convert benzene into 

1. p-nitrobromobenzene
2. m-nitrochlorobenzene 
3. p -nitrotoluene
4. acetophenone

Why is benzene extra ordinarily stable though it contains three double bonds?