Choose the most appropriate option from the list given below to fill in the blanks.
[NO, Nessler's reagent, NO₂, Iron, brown ring, magnesium, Haber's, Ostwald, Iron (II) sulphate, Hydrogen, Iron (III) sulphate]

(a) A yellow non-metal, sulphur reacts with nitric acid to liberate …………… .

(b) …………… test is used to identify the nitrate radical.

(c) Dilute HNO₃ reacts with copper evolving …………… gas.

(d) Nitric acid is obtained on a large scale by the …………… process and the catalyst used is …………… .

(e) In …………… test, freshly prepared …………… solution is used.

(f) Nitric acid in a very dilute form reacts with …………… to form …………… .

(a) A yellow non-metal, sulphur reacts with nitric acid to liberate NO₂ (Nitrogen dioxide).

(b) Brown ring test is used to identify the nitrate radical.

(c) Dilute HNO₃ reacts with copper evolving NO (Nitric oxide)) gas.

(d) Nitric acid is obtained on a large scale by the Ostwald process and the catalyst used is platinum.

(e) In Brown ring test, freshly prepared Iron (II) sulphate solution is used.

(f) Nitric acid in a very dilute form reacts with magnesium to form hydrogen.