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The flow chart below shows the industrial preparation of ammonia and the process used in the manufacture of some ammonium compounds. Study it and answer the questions that follow.
(a) Give the name of the:
(i) Process in step 1
(ii) Reaction that takes place in step 5.
(b) State one other source of hydrogen gas apart from natural gas.
(c) Explain why it is necessary to compress nitrogen and hydrogen in this process.
(d) Write an equation for the reaction which takes place in step 6.
(e) Name the catalyst and the reagents used in step 3.
(f) Name compound Z1.
(g) Give one commercial use of compound Z2.