Which one will not migrate towards cathode in an electrolytic cell ?

Options

A. Lead ion
B. Chloride ion
C. Potassium ion
D. Calcium ion

Answer

To solve the question "Which one will not migrate towards the cathode in an electrolytic cell?", we can follow these steps:

### Step 1: Understand the Components of an Electrolytic Cell
An electrolytic cell consists of two electrodes: the anode and the cathode. The anode is positively charged, while the cathode is negatively charged.

### Step 2: Identify the Movement of Ions
In an electrolytic cell, cations (positively charged ions) migrate towards the cathode, and anions (negatively charged ions) migrate towards the anode. This is due to the attraction between opposite charges.

### Step 3: Analyze the Given Ions
The question may provide a list of ions, including:
- Lead ion (Pb²⁺)
- Chloride ion (Cl⁻)
- Potassium ion (K⁺)
- Calcium ion (Ca²⁺)

### Step 4: Determine Which Ion Will Not Migrate Towards the Cathode
From the list:
- Lead ion (Pb²⁺) is a cation and will migrate towards the cathode.
- Potassium ion (K⁺) is also a cation and will migrate towards the cathode.
- Calcium ion (Ca²⁺) is another cation and will migrate towards the cathode.
- Chloride ion (Cl⁻) is an anion and will migrate towards the anode.

### Conclusion
The ion that will not migrate towards the cathode is the **chloride ion (Cl⁻)**, as it is negatively charged and will move towards the positively charged anode instead.

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