Question

Which of the following statements are correct about voltaic cell?
(I) Chemical energy is converted into electrical energy.
(II) Electrons flow from anode to cathode.
(III) Oxidation occurs at anode.
(IV) Anode is negative and cathode is positive.

• A. I and III
• B. I, II and III
• C. I, III and IV
• D. I, II, III and IV

Answer 1

The correct option is D I, II, III and IV

The voltaic cells convert chemical energy into electrical energy. Thus, a spontaneous chemical reaction generates chemical energy.

Through external circuit, electrons flow from anode to cathode.

Oxidation occurs at anode and reduction occurs at the cathode.

Since, during oxidation the ions supply electrons to anode, the anode is a negative electrode. Similarly, the cathode is a positive electrode.

Option D is correct.