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Rashi soaked ...

Question

Rashi soaked her table cloth in the mixture of alcohol and water, on exposure to heat quickly catches fire which gets extinguished after a short while without burning the cloth. Why is it so?

A

The ignition temperature of alcohol is higher than cloth.

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B

The ignition temperature of cloth is higher than that of alcohol.

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C

The matchstick was of bad quality.

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D

Both A and C

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Solution

The correct option is B
The ignition temperature of cloth is higher than that of alcohol.

The ignition temperature of alcohol is lower than that of the cloth. When exposed to heat, alcohol catches fire. The heat produced due to the burning of alcohol is not sufficient to raise the temperature of the wet cloth to its ignition temperature. Thus, the fire gets extinguished after alcohol is burnt and the cloth remains unburnt.

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Q. Question 16
Fill in the blanks in the following sentences.
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If the clothes of a person working in the kitchen catch fire, then to extinguish the fire :

(a) sand should be thrown over the burning clothes

(b) water should be thrown over the burning clothes

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(d) woollen blanket should be used to cover the burning clothes

While working in the kitchen, clothes of Priya catches fire accidentally causing severe burns. The person is most likely wearing clothes made of :

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