Select the appropriate option and complete the following paragraph.
(single, double, hydrocarbons, `C_(2)H_(4), C_(2)H_(6), CHCl_(3), CH_(3)Cl,` methane, ethane)
Carbon compounds contain carbon and hydrogen as the only two elements are called __________. The smallest hydrocarbon is ________. Another hydrocarbon is ___________with molecular formula __________. In both these hydrocarbons, the valencies of all the atoms are satisfied by the _________ bonds. If one hydrogen atom of methane is replaced by another monovalent element chlorine, then a new carbon compounds is formed. The molecular formula of this compound is ___________.