1.  Define the term aromaticity.

2.  State Huckel’s rule.

3.  Classify the following compounds as aromatic or non aromatic.

     i)cyclobutene   ii) benzene  iii) tropylium cation

4.  What is homo aromaticity?

5.   State whether [10]-annulene  is aromatic?

6.  Is [12]- annulene  aromatic/antiaromatic? Reason out.

7.  Explain the aromaticity of fulvenes.

8.  Check  the following compounds for their aromaticity using Huckel's rule

i) [10]- annulene   ii) benzene  iii) cyclobutadiene  iv) cyclepentadienyl anion.

9. Give one example for the fused ring system which are aromatic.

10. Differentiate the following terms aromatic and antiaromatic.