For denaturation of ethanol

Options

A. Copper sulphate is added to give colour and pyridine for foul smell
B. Nickel sulphate is added to give colour and aniline for foul smell
C. Copper sulphate is added to give colour and aniline for foul smell
D. Nickel sulphate is added to give colour and pyridine for foul smell

Answer

To solve the question regarding the denaturation of ethanol, we can follow these steps:

### Step 1: Understand Ethanol
Ethanol is a colorless liquid that has a boiling point of 351 Kelvin. It is commonly used as a solvent in various industries, including the paint industry, and in the preparation of a number of carbon compounds.

**Hint:** Remember the physical properties and uses of ethanol as a foundation for understanding its denaturation.

### Step 2: Define Denaturation
Denaturation refers to the process of making a substance unfit for consumption. In the case of ethanol, this is done to prevent it from being used as a beverage.

**Hint:** Focus on the purpose of denaturation in industrial applications.

### Step 3: Identify Additives for Denaturation
To denature ethanol, certain substances are added. Common additives include:
- **Copper Sulphate:** This is added to give the ethanol a distinct color.
- **Pyridine:** This is added to impart an unpleasant smell, making it foul-smelling and unpalatable.

**Hint:** Think about the sensory characteristics (color and smell) that are altered during the denaturation process.

### Step 4: Evaluate the Options
Given the options provided in the question, we need to identify which substances are used for denaturing ethanol:
1. Copper Sulphate (for color)
2. Pyridine (for foul smell)

We can eliminate options that include substances not used in the denaturation process, such as nickel sulphate or aniline.

**Hint:** Cross-reference the additives with the definitions and characteristics discussed.

### Step 5: Conclusion
After evaluating the options, the correct answer for the denaturation of ethanol is the one that includes both copper sulphate and pyridine.

**Final Answer:** The correct option for the denaturation of ethanol is the one that states copper sulphate is added for color and pyridine for foul smell.

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