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(a) Describe the process by which nitrogen is obtained from air on a large scale.
(b) Study the flow chart below and answer the questions that follow.
(i) Identify gas J.
(ii) Using oxidation numbers, show that ammonia is the reducing agent in step (VI).
iii) Write an equation for the reaction that occurs in step(V)
iv) Give one use of ammonium nitrate.
c)The table below shows the observations made when aqueous ammonia was added to cations of elements E, F and G until in excess.
(i) Select the cation that is likely to be #Zn^(2+)#.
(ii) Given that the formula of the cation of element E is# E^(2+)#, write the ionic equation for the reaction between# E^(2+)# (aq) and aqueous ammonia.