2. Give the procedure for separation of the following:
(a) Crude oil into its constituents
(b) A mixture of water and petroleum ether
(c) A mixture of ethanol and propanone.,
2.
What are the applications of the following Spectroscopic
techniques in organic Chemistry?
(a) Infra-red spectroscopy (b) Ultra-violet visible spectroscopy
(c) Nuclear magnetic resonance spectroscopy (d) Mass
spectrometry

No multiple choices?

Hydrogen is the most abundant element on the periodic table..hope it .

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.