Home › UP Board Class 12 › chemistry › Electrochemistry › The byproduct of a hydrogen-oxygen fuel cell (us…
The byproduct of a hydrogen-oxygen fuel cell (used in space + electric cars) is:
AWater (H2O), making it clean energy
BCarbon dioxide (greenhouse gas)
CSulphur dioxide (acidic gas)
DNitrogen oxides (smog component)
Answer & Solution
Correct answer: A. Water (H2O), making it clean energy
Reaction: 2H2 + O2 → 2H2O. Only byproduct is WATER, making H2-O2 fuel cells the cleanest energy source. Used in NASA Apollo missions, Toyota Mirai EVs. Hydrogen economy explores this for clean transport.
Related questions
For an electrochemical cell operating spontaneously, ΔG° is related to E°_cell byWhich of the following statements about electrode potentials is INCORRECT?The overall cell reaction of the lead storage battery on discharge isThe primary cell that cannot be reused after its EMF drops to zero is exemplified byRusting of iron requires which two chemicals in contact with the metal?Fuel cells directly convertThe specific conductivity of a 0.1 M KCl solution is 1.29 × 10⁻² S/cm. The molar conductivMolar conductivity of a strong electrolyte at concentration c is related to its limiting v