Q34 of 312 Page 221

Giving their structures, state the number of single bonds and triple bonds (if any) in the following compounds:

(i) ethyne


(ii) ethane


(iii) benzene

(i) Ethyne:



In ethyne, single bond is two and triple bond is one.


(ii) Ethane:



In ethane, single bond is seven and no triple bond.


(iii) Benzene:



In benzene, single bond is nine and no triple bond.



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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). 34 Write the molecular formula and structure of cyclohexane. How many covalent bonds are there in a molecular of cyclohexane? 35 Write the points of different in the structure of diamond and graphite.