Which of the following method is used to produce dihydrogen of high degree purity in maximum amount?

Options

A. Zn+ NaOH
B. with electrolysis of warm aqueous barium hydroxide solution between nickel lectrodes
C. by electrolysis of brine solution
D. by electrolysis of alkaline water using platinum electrodes

Answer

To solve the question regarding the method used to produce dihydrogen of high degree purity in maximum amount, we will analyze the options provided and determine the most suitable method based on the criteria given in the question.

### Step-by-Step Solution:

1. **Understanding the Requirements**:
- We need a method that produces dihydrogen (H₂) with a purity greater than 99.95%.
- The method should be capable of commercial production, meaning it should yield a large quantity of dihydrogen.

2. **Analyzing the Options**:
- **Option 1: Zn + NaOH**:
- This reaction produces sodium zincate (Na₂ZnO₂) and dihydrogen.
- However, this method is typically used for laboratory preparation and does not yield dihydrogen in large amounts suitable for commercial production.
- **Conclusion**: This option is incorrect.

- **Option 2: Electrolysis of warm aqueous barium hydroxide solution using nickel electrodes**:
- This method is known for producing dihydrogen of high purity and is suitable for commercial production.
- The electrolysis of barium hydroxide solution effectively separates hydrogen and oxygen, resulting in high-purity dihydrogen.
- **Conclusion**: This option is correct.

- **Option 3: Electrolysis of brine solution**:
- In this process, dihydrogen is produced as a by-product while chlorine is generated as the main product.
- Since dihydrogen is not the primary product, the purity is not guaranteed to be high.
- **Conclusion**: This option is incorrect.

- **Option 4: Electrolysis of alkaline water using platinum electrodes**:
- While electrolysis of water can produce dihydrogen, the mention of alkaline water is misleading.
- The method for commercial production typically involves acidified water, not alkaline water.
- **Conclusion**: This option is incorrect.

3. **Final Conclusion**:
- The best method for producing dihydrogen of high degree purity in maximum amount is **Option 2: Electrolysis of warm aqueous barium hydroxide solution using nickel electrodes**.