Identify the correct statement with respect to unsaturated hydrocarbons.
1
Compounds of carbon having a single bond between their carbon atoms are called unsaturated compounds.
2
Compounds of carbon having double bonds or triple bonds between their carbon atoms are called unsaturated compounds.
3
Compounds of carbon having single bonds between their oxygen atoms are called unsaturated compounds.
4
Compounds of carbon having double or triple bonds between their hydrogen atoms are called unsaturated compounds.