Write the characteristics of hydrocarbons .

Explanation

Some animals communicate with each other over long distance and also locate object by sending the sound signals and receiving the echo as reflected from targets.
(b) The principle of echo is used in obstetric ultrasonography, which is used to create real-time visual images of the developing embryo or fetus in the mother.s uterus. This is a safe testing tool, as it does not use any harmful radiations.
(c) Echo is used to determine the velocity of sound waves in any medium.
(a) Lower hydrocarbons are gases at room temperature.
(b) Alkanes are least reactive where alkynes are most reactive due to presence triple bond.
(c) Alkanes are saturated whereas alkenes and alkynes are unsaturated.
(d) They are insoluble in water.