Chapter 4: Problem 3

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that (a) the food is not cooked completely. (b) the fuel is not burning completely. (c) the fuel is wet. (d) the fuel is burning comnletelve

Short Answer

Expert verified

The fuel is not burning completely.

Step by step solution

Understand the Problem

Identify the cause of the vessel's bottom becoming blackened during cooking. Analyzing what happens when fuel does not burn efficiently will help in finding the answer.

Review the Options

Consider each of the given options: (a) the food is not cooked completely, (b) the fuel is not burning completely, (c) the fuel is wet, (d) the fuel is burning completely. Eliminate options that do not typically cause blackening of the vessel.

Evaluate Each Option

Option (a) focuses on the cooking status of the food, which generally does not cause blackening. Option (b) suggests incomplete combustion of the fuel, often resulting in soot and blackening. Option (c) mentions wet fuel, which may affect combustion but is not a direct cause of blackening. Option (d) indicates complete combustion, which usually produces a clean burn without soot.

Conclusion

From the evaluation, incomplete combustion of the fuel (Option b) is the primary cause of blackening on the outside of the vessel.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Incomplete Combustion

When fuel burns, it undergoes a chemical reaction with oxygen to produce energy. However, if there isn't enough oxygen available during this process, incomplete combustion occurs. Incomplete combustion usually happens when there is not enough air supply or when the fuel itself doesn't burn completely. This process results in the formation of soot and carbon monoxide, which are harmful substances. Soot sticks to surfaces like the bottoms of vessels, causing them to blacken. It’s a clear sign that fuel is not burning efficiently.

Efficient Burning

Efficient burning refers to the ideal combustion process where fuel burns completely, producing water vapor and carbon dioxide as the main byproducts. For efficient burning, a proper mix of fuel and oxygen is crucial. This balance ensures that the fuel is used entirely, avoiding the creation of pollutants like soot and carbon monoxide. Efficient burning leads to better fuel economy and is more eco-friendly. Key points to ensure efficient burning:

Proper air supply: Ensure there's enough oxygen for the fuel to burn completely.
High-quality fuel: Use clean and dry fuel to improve the burning efficiency.

Always aim for complete combustion to achieve efficient burning and avoid problems like blackened vessels.

Soot Production

Soot is a byproduct of incomplete combustion, comprised mainly of carbon particles. It's often seen as a black, powdery substance and can be harmful to health and the environment. During incomplete combustion, fuel molecules partially break down, forming carbon particles that cluster together to create soot. This soot can stick to surfaces, making them look dirty or blackened, as observed in cooking utensils. To minimize soot production:

Ensure proper ventilation: Adequate oxygen supply helps fuel burn completely.
Maintain equipment: Regular cleaning and maintenance of burners can reduce incomplete combustion.
Use high-quality fuel: Clean and dry fuel reduces the chances of soot formation.

Minimizing soot production not only keeps cooking vessels clean but also promotes a healthier living environment.

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While cooking, if the bottom of the vessel is getting blackened on the outside, it means that (a) the food is not cooked completely. (b) the fuel is not burning completely. (c) the fuel is wet. (d) the fuel is burning comnletelve

Short Answer

Step by step solution

Understand the Problem

Review the Options

Evaluate Each Option

Conclusion

Key Concepts

Incomplete Combustion

Efficient Burning

Soot Production

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