Boiling of water for a few minutes kills germs and bacteria present in it.
True
False
Germs and bacteria do not survive at higher temperatures. Water boils at 100∘C and hence at this temperature, the germs and bacteria get destroyed.
Rhizobium bacteria fix nitrogen and are present in the roots of all plants. True or false?
When we take out a laboratory thermometer from boiling water, the mercury level does not fall even after few minutes.
Take a tin can with a lid and fill it half with water. Heat the can on a candle flame till water boils. Let it boil for a few minutes and immediately put the lid tightly on the can. Pour fresh water over the can. You can see a shape change for the tin box. What is the reason for the change in shape?