Carbon dioxide is a gas having chemical formula 
, a gas which exhaled by humans and inhaled by plants. It is also emitted from the sources such as cement production and combustion of fossil fuels. It is also known as greenhouse gas associated with acidification of ocean.
Carbon dioxide with other gases acts like a blanket of Earth which absorbs infrared radiations emitted from the sun and thus, preventing the escaping of these rays into the outer space which results in the gradual heating of Earth's surface and atmosphere i.e. increase in temperature of Earth. This process is known as Global Warming.
Hence, carbon dioxide is responsible for the increase in warming of the atmosphere i.e. option (D).
Answer:
2 sigma bonds
CS2 is called carbon disulphide. The 2 unpaired electrons of each sulphur atom get paired with the 4 unpaired electrons of carbon. But it is a double bond. That is, 2 sigma bonds (sigma s-p , sigma p-p) and 2 pi (πp-p) bonds.
Explanation:
Lithium's atomic weight is 6.94 g/mol.
Need anything else?
Explanation:
about 78 % of the air is nitrogen and 21% is oxygen . These two gases can be seperated by fractional distillated of liquid air . Air is filtered to remove dust ,and then cooled in states until it reaches -200'C at this tempereture it is liquid . The air has been liquefied. And after a distillation process you can obtain nitrogen from a mixture of nitrogen and oxygen .
