In physics, a chemical gas is a state that contains negligible particles – atoms, molecules, electrons, ions, etc. Gases do not have a specific volume and shape which are in random motion. Now-a-days due to expansion of commercial activities different kind of toxic substances release in the atmosphere in the form of gas. Such commercial gases can also be very harmful for the living world. Breathing natural gas (oxygen) is essential for the survival of mankind. But when this state is mixed with the harmful chemicals such gases can cause many human disorders – hereditary disorders, depression, asthma, etc. In the war period, there are harmful chemical which are used as war weapons especially in the form of atom-bombs and nuclear bombs. Due to these weapons many harmful chemical gases get mixed up with the air which causes the decline in the ratio of oxygen in the air. It is not true that every chemical gas is harmful for the efficient survival of human beings but there are various gases in the atmosphere which lead to healthy human life. |
