Which of the following is NOT related to green chemistry in day-to-day life?

Options

A. Use of liquefied carbondioxide as solvent for dry cleaning
B. Use of hydrogen peroxide with suitable catalyst for bleaching of paper
C. Commercial preparation of ethanal by one step oxidation of ethene in the presence of ionic catalyst Pd(II) in aqueous medium
D. Use of sodium chlorate as pest controlling substance

Explanation

To determine which of the options is NOT related to green chemistry in day-to-day life, let's analyze each option step by step:

### Step 1: Analyze the first option
**Option 1: Use of liquefied carbon dioxide as a solvent for dry cleaning.**
- Traditional dry cleaning methods often use tetrachloroethylene (C2Cl4), which is harmful to the environment and is a suspected carcinogen.
- The use of liquefied carbon dioxide as a solvent is a greener alternative because it reduces environmental contamination and is less harmful to groundwater.
- **Conclusion:** This option is related to green chemistry.

### Step 2: Analyze the second option
**Option 2: Use of hydrogen peroxide with a suitable catalyst for bleaching of paper.**
- Hydrogen peroxide is an environmentally friendly bleaching agent that decomposes into water and oxygen.
- Using it with a suitable catalyst reduces the amount of water needed and improves efficiency, aligning with green chemistry principles.
- **Conclusion:** This option is related to green chemistry.

### Step 3: Analyze the third option
**Option 3: Commercial preparation of ethanol by one-step oxidation of ethane in the presence of ionic catalyst (Wacker process).**
- The Wacker process is a method for producing acetaldehyde from ethylene using palladium as a catalyst, which is efficient and reduces waste.
- This method is considered a significant advancement in green chemistry due to its efficiency and lower environmental impact.
- **Conclusion:** This option is related to green chemistry.

### Step 4: Analyze the fourth option
**Option 4: Use of sodium chlorate as a pest-controlling substance.**
- Sodium chlorate (NaClO3) is a chemical that can be harmful to the environment and is not considered a green alternative for pest control.
- It can lead to environmental contamination and does not align with the principles of green chemistry, which aim to minimize harmful substances.
- **Conclusion:** This option is NOT related to green chemistry.

### Final Answer
The correct answer is **Option 4: Use of sodium chlorate as a pest-controlling substance**. This option is not related to green chemistry in day-to-day life.

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