Assertion:Lithium has the lowest electrode potential.
Reason: Lithium ion is the strongest oxidising agent.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion .
B. If both assertion and reason are true but reason is not the correct explanation of assertion .
C. If assertion is true but reason is false .
D. If both assertion and reason are false .

Explanation

To solve the question, we need to analyze both the assertion and the reason provided:

**Assertion:** Lithium has the lowest electrode potential.
**Reason:** Lithium ion is the strongest oxidizing agent.

### Step 1: Understanding Electrode Potential
Electrode potential is a measure of the tendency of a chemical species to be reduced. The more negative the electrode potential, the less likely the species is to gain electrons.

**Hint:** Recall that lower electrode potential indicates a stronger tendency to lose electrons rather than gain them.

### Step 2: Analyzing Lithium's Electrode Potential
In the electrochemical series, lithium has the lowest reduction potential among common metals. This means that lithium is more likely to lose electrons than to gain them, making it a strong reducing agent.

**Hint:** Look at the electrochemical series to compare the reduction potentials of different elements.

### Step 3: Evaluating the Reason
The reason states that the lithium ion (Li⁺) is the strongest oxidizing agent. An oxidizing agent is a substance that gains electrons and is reduced. However, since lithium has a low reduction potential, it does not favor gaining electrons; instead, it prefers to lose them.

**Hint:** Remember that a strong oxidizing agent must have a high tendency to gain electrons, which contradicts the assertion about lithium.

### Step 4: Conclusion
From the analysis:
- The assertion is true: Lithium does have the lowest electrode potential.
- The reason is false: Lithium ion is not the strongest oxidizing agent; it is actually a weak oxidizing agent.

Thus, the correct answer is that the assertion is true, but the reason is false.

**Final Answer:** The correct option is that the assertion is true, but the reason is false.