It is desired to produce ammonia gas from nitrogen and hydrogen according to the reaction:
\({ N }_{ 2 }(g)+3H_{ 2 }(g)\rightleftharpoons 2NH_{ 3 }(g)+Heat\)
Above reaction is exothermic and therefore, favored by low temperature. As a student of chemistry,which temperature would you suggest 350k or 750 k? Justify 

Nitrogen fertilizers are commonly used to promote the growth of plants and boost the crop yield.As a student of chemistry,can you suggest a farmer whether he should use excess nitrogen fertilizers to get maximum yield or not?

Sulphuric acid is manufactured by Contact process.During the process,the following reaction takes place:
\({ 2SO }_{ 2 }(g)+O_{ 2 }(g)\rightleftharpoons 2SO_{ 3 }(g)\)
This reaction is favoured by high pressure, However,the pressure is not increase beyond 3 bar.As a students of chemistry how will you justify this?

Account for the following:
(i) Iron on reaction with HCI forms FeCl₂ and not FeCI₃.
(ii) Draw structure of XeO_3.