65. 1. Write down the structural formula of ethane.   66. 2. What type of reaction has taken place between ethane and chlorine?   67. (ii) The type of reaction between ethene and chlorine is different from that between ethane and chlorine.  1. What is the type of reaction between ethene and chlorine?   68. 2. What feature of the ethene structure makes such a reaction possible?   69. 3. Name the product of the reaction between ethene and chlorine.