Write the molecular formula and structure of benzene.

32 Give the name and structure formula of one member each of the following:

(i) alkane

(ii) alkene

(iii) alkyne

(iv) cycloalkane

32 Give the common name of (i) ethyne, and (ii) ethane. 33 What is the unique property of carbon atom? How is the property helpful to us? 33 Explain why, diamond is hard while graphite is soft (though both are made of carbon atoms).