Question

Select false statement from the following regarding electrochemical cell.

• A. Standard cell potential of electro chemical cell is an intensive property.
• B. Electrode potential depends on concentration of salt solution in contact with electrode.
• C. Standard free energy change of cell is an intensive property.
• D. Electrical work done in galvanic cell is equal to decrease in Gibb's energy.

Hint:

Check which properties are intensive (independent of amount) and which are extensive.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
Intensive properties do not depend on the amount of substance, while extensive properties do.

Step 2: Check cell potential
Standard cell potential \(E^{\circ}\) is intensive, and electrode potential depends on salt concentration (Nernst equation), so the first two statements are true.

Step 3: Check free energy
\(\Delta G^{\circ}=-nFE^{\circ}\) depends on \(n\), the number of electrons, so it is an extensive property. Calling it intensive is false.

Step 4: Last statement
Electrical work obtained from a galvanic cell equals the decrease in Gibbs energy, which is true.

Final Answer:
The false statement is that standard free energy change is intensive. \[ \boxed{\text{(C) }\text{Standard free energy change of cell is an intensive property.}} \]