A paper-wrapped tightly around the joint of a brass tube and its wooden handle is put in a flame, the paper will:

a)
catch fire immediately

b)
not burn at any place

c)
burn around the brass tube

d)
burn around the wooden handle

Correct answer is option 'D'. Can you explain this answer?

Question

A paper-wrapped tightly around the joint of a brass tube and its wooden handle is put in a flame, the paper will:

a)
catch fire immediately
b)
not burn at any place
c)
burn around the brass tube
d)
burn around the wooden handle

Correct answer is option 'D'. Can you explain this answer?

Answer

Correct option is D
... Already given...
Conclusion -) Therefore the paper will burn around the wooden handle rather than catching fire immediately or burning elsewhere. This experiment demonstrates the difference in thermal conductivity between the brass tube and the wooden handle, leading to the selective burning of paper....
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Answer

Here the brass is a metal, and the heat supplied to the paper wrapped brass tube will not catch fire because heat supplied to the paper is absorbed by brass so that part wouldn't burn whereas the wooden handle will definitely burn because it has reached ignition temperature. Ignition temperature is the lowest temperature at which a substance catches fire.

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Answer

The Paper will burn around the wooden handle.

- When the paper-wrapped tightly around the joint of a brass tube and its wooden handle is put in a flame, the paper will burn around the wooden handle rather than catching fire immediately or burning elsewhere.

Explanation:

- The outcome of this experiment can be understood by considering the properties of the materials involved.

Combustibility of Paper:

- Paper is highly combustible and can catch fire easily when exposed to a flame. It is made from cellulose fibers, which are organic materials that can burn readily.

Conductivity of Brass:

- Brass is a metal alloy made primarily of copper and zinc. It is known for its excellent thermal conductivity, which means it can transfer heat efficiently. When the flame is applied to the brass tube, the heat quickly spreads across the metal surface.

Insulating Property of Wood:

- Wood, on the other hand, is a poor conductor of heat. It is an insulating material that does not readily transfer heat. When the flame reaches the paper-wrapped joint, the heat is unable to pass through the wooden handle easily.

Result:

- As a result, the paper in direct contact with the wooden handle remains relatively cooler compared to the portion in contact with the brass tube. The heat from the flame is concentrated around the brass tube, causing the paper to burn around it.

Conclusion:

- Therefore, the paper will burn around the wooden handle rather than catching fire immediately or burning elsewhere. This experiment demonstrates the difference in thermal conductivity between the brass tube and the wooden handle, leading to the selective burning of the paper.

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