A thin paper cup filled with water does not catch fire when place… - Vidyadip

MCQ

A thin paper cup filled with water does not catch fire when placed over a flame. This is because

A
the water cuts off oxygen supply to the paper cup
B
water is an excellent conductor of heat
✓
the paper cup does not become appreciably hotter than the water it contains
D
paper is a poor conductor of heat

✓

Answer

Correct option: C.

the paper cup does not become appreciably hotter than the water it contains

c
(c)

Thermal resistance of thin layer of paper is quite less, so heat reaches across the paper and water absorbs that heat. Temperature of paper does not rises beyond $100^{\circ} C$ and upto its burning temperature.

$\therefore$ Paper cup does not catches fire.

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