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Question

An astronaut on the moon takes out a paper and uses a magnifying lens to focus sunlight on the paper. The paper does not catch fire. What can be reason for this occurence?

A
Absence of sunlight
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B
Absence of oxygen
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C
Absence of carbon dioxide
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D
Absence of wind
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Solution

The correct option is B Absence of oxygen
For a fire to occur, all the factors that support combustion are required. Factors that support combustion are:
- Presence of a combustible substance
- Supply of oxygen
- High ignition temperature
In the absence of any of these, fire will not take place. Since moon has no oxygen supply, the paper will not catch fire.

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