Which of the following is an unsaturated compound?
C6H12
Unsaturation in a carbon compound is due to the presence of carbon-carbon double or triple bonds.
C6H12 is an alkene with a possible structure CH3−CH2−CH2−CH2−CH=CH2. As you can see there is a presence of a double bond, so it is an unsaturated compound. Alkanes and alkanes derivatives are saturated compounds. While C6H14 is an alkane (hexane). C3H7OH and C3H7OH are alkane derivatives. Hence option B is correct.