4. Take a beaker with some water and place a lighted candle in standing position in it. Now cover the candle with a test tube to cut off it air supply. For how long does the candle keep on burning? How much water rises up in the test tube? Why did it happen so? Explain with diagram. You can perform this experiment with utensils available at your home in case of non availability of the beaker and test tube.

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.

Contained in chromosomes which are located in the nucleus of the cell.