Which of the following is the most environmentally friendly source to derive energy?
Correct answer: B. H2 - O2 fuel cell
- A. Lead-acid accumulator
- B. H2 - O2 fuel cell
- C. Silver oxide battery
- D. Alkaline battery
Explanation
All the sources listed except H2 - O2 fuel cells produce electrical energy but they need to be disposed of eventually. H2 - O2 fuel cells produce energy as long as the reactants are supplied and do not need any kind of disposal.Also, H2-O2 fuel cells produce only water, electricity, and heat as products that don't harm the environment. The lead from lead acid batteries is released into the environment as waste.
Last updated
About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
Practise Electrochemistry
696 free Electrochemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A 10 volume solution of H2O2 means_______?
A reaction in which the same element is both oxidised and reduced is called
A solution of Sodium Sulphate was electrolyzed using some inert electrode; the products at the electrodes are:
Aluminum is refined in _ cell.
Any process of chemical decay of metals due to the action of surrounding medium is called__________________?