Which of the following represents a process in which a species is reduced? a) Ca(s) - Ca2+ (aq)

b) Hg() - Hg22+(aq)

c) Fe2+(aq) - Fe3+(aq)

d) NO3 (aq) - NO(9)

e) 5032 (aq) - S04- (aq)

The equation that represents the process of reducing a specie is : ( D )

   NO₃ (aq) - NO(g)

The reduction of a specie is a chemical reaction process which  involves the removal of oxygen atom(s) and the the addition of hydrogen.  

A reduced specie gains/accepts electrons therefore becoming more electronegative  ( i.e. the number of electronegative atoms around it is reduced ) and It also experiences a decrease in its oxidation number

From the options provided the number of oxygen present in NO₃ reduces from O₃  to O  This makes option D the correct option representing the reduction of specie

Hence we can conclude that the The equation that represents the process of reducing a specie is

   NO₃ (aq) - NO(g)

Learn more about specie reduction : link

D

Explanation:

Option D is the right answer. A substance that has been reduced undergoes chemical reduction. They show the following properties;

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