____ is a gas that is produced by the ultraviolet radiation in the air in the vicinity of welding operations.Group of answer choicesArgonPhosgeneOzoneCarbon dioxide

A welding fuel gas contains carbon and hydrogen only. Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. A volume of 10.0 litre (measured at STP) of this welding gas is found to weigh 11.6 g. Calculate molecular formula of gas.

Which of the following is NOT produced by burning coal?a.Ozoneb.SO2c.NOxd.CO2

What is the second most common gas in the atmosphere?Group of answer choicesoxygenhydrogennitrogenwater vaporcarbon dioxide

Out of the following gases which one makes about 1/5th of the atmosphere?Group of answer choicesoxygencarbon dioxidesulfer dioxideheliumnitrogen

Gas A, obtained above is a reactant for a very important biochemical process which occurs inthe presence of sunlight. Identify the name of the process -a) Respirationb) Photosynthesisc) Transpirationd) sphotolysis