Chemistry of Gases and Applications

Fluorescent tubes contain a small amount of mercury vapor and an inert gas like argon to facilitate the electrical discharge that produces ultraviolet light, which then excites the phosphor coating.

Inert gases like Argon are typically used in bulbs to prevent the filament from burning out. Helium is an inert gas, though Argon is more common; among the choices, Helium is the only inert gas.

 Nitrogen fixation is the process, which converts atmospheric nitrogen into nitrogen salts, ammonification refers to formation of ammonia from organic nitrogen, and denitrification refers to the conversion of nitrogen salts into atmospheric nitrogen back. To keep the percentage of nitrogen constant in the atmosphere, all these processes along with some other go simultaneously and the process in known as nitrogen cycle. 

Plants and animals contain nitrogen as a major constituent of their body in form of proteins in major. The percentage of atmospheric nitrogen i.e. N₂ gas is very high but it cannot be directly used and utilized by living organisms. Nitrogen does not exist in elemental form as N so can not be used also. The gaseous N¬2 from the atmospheric is first converted into such compounds, which are readily used by plants and animals and thus is the correct option

An emulsion dispersion is thermoplastics or elastomers suspended in a waterphase with help of emulsifiers.

Incandescent bulbs are filled with inert gases like Argon or Nitrogen to prevent the filament from burning up due to oxidation. Nitrogen is a common choice among the options provided.

CNG is the Compressed Natural Gas.

Chlorodifluoromethane is a hydrochlorofluorocarbon (HCFC). It is commonly used as a propellant and in air conditioning applications. It is a versatile intermediate in industrial organofluorine chemistry, e.g. as a precursor to tetrafluoroethylene.

Compressed Natural Gas (CNG) is primarily composed of methane, with smaller amounts of ethane and other hydrocarbons.

This option is correct because during the reaction of hydrocarbon and oxides of N₂ in presence of ultraviolet light, O₃, PAN and aldehydes all are produced.

In the experiment to prove chemical evolution of life, Miller used H₂,N₂, CH₄, NH₃ etc. and obtained aminoacids.

Titan, the largest moon of Saturn, has a thick atmosphere rich in nitrogen and methane. Due to the extremely cold temperatures, methane exists in liquid form and falls as rain, creating lakes and rivers on the surface.

UN investigators confirmed that Sarin gas was used in the Ghouta chemical attack in Damascus in August 2013.

Diffusion involves mixing of gases

Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.