Question

How will you bring about the following conversions?
Nitric oxide from nitre.

Answer 1

Conversion of nitre into nitric oxide involves the following steps:
$$[KNO_3+H_2SO_4 \to KHSO_4+HNO_3] \times 2$$
$$2HNO_3 \to H_2O+2NO+3[O]$$
$$[2FeSO_4+H_2SO_4+[O]\to Fe_2(SO_4)_3+H_2O]\times 3$$
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$$2KNO_3+6FeSO_4+5H_2SO_4 \to 2KHSO_4+3Fe_2(SO_4)_3+4H_2O+2NO$$