Question

Which of the following reactions is used to make a fuel cell?

(a) Cd_(s) + 2Ni(OH)_3(s) → CdO_(s) + 2Ni(OH)_2(s) + H₂O_(I)

(b) Pb_(s) + PbP_2(s) + 2H₂SO_4(aq) → 2PbSO_4(s) + 2H₂O_(I)

(c) 2H_2(g) + O_2(s) → 2H₂O_(I) 

(d) 2Fe_(s) + O_2(g) + 4H⁺_(aq) → 2Fe²⁺_(aq) + 2H₂O_(I)

Answer 1

Correct option (c) 2H_2(g) + O_2(s) → 2H₂O_(I) 

Explanation:

Fuel cells are galvanic cells in which chemical energy of fuel is directly converted into electrical energy.

e.g., Hydrogen - oxygen fuel cell.