Two organic compounds A and B have the same molecular formula C₆H₁₂. Write the names and structural formulae:
(a) if A is a cyclic compound
(b) if B is an open chain compound
(c). Which compound contains single bonds as well as a double bond? 
(d) Which compound contains only single bonds?
 

You are given the following molecular formulae of some hydrocarbons: 

${\mathrm{C}}_5{\mathrm{H}}_8; {\mathrm{C}}_7{\mathrm{H}}_{14}; {\mathrm{C}}_6{\mathrm{H}}_6; {\mathrm{C}}_5{\mathrm{H}}_{10}; {\mathrm{C}}_7{\mathrm{H}}_{12}; {\mathrm{C}}_6{\mathrm{H}}_{12}$

(a) Which formula represents cyclohexane as well as hexene?
(b) Which formula represents benzene?
(c) Which three formulae represent open chain unsaturated hydrocarbons having double bonds?
(d) Which two formulae represent unsaturated hydrocarbons having triple bonds?
(e) Which three formulae can represent cyclic hydrocarbons?
 

Which of the following compounds can have a triple bond?

${\mathrm{C}}_2{\mathrm{H}}_4; {\mathrm{C}}_3{\mathrm{H}}_4; {\mathrm{C}}_3{\mathrm{H}}_6$