Question Paper from: Railway RPF Sub Inspector

The open "Sigrees" or coal stoves often require fanning to sustain burning because of–

1:

tendency of carbon dioxide to form a layer along with dust smoke

2:

lack of oxygen in the surroundings of sigrees

3:

accumulation of smoke and dust over the sigrees

4:

interrupted release of moisture from the material

Solution:
Chapter Name: Science

This has been asked in Question Paper

Railway RPF Sub Inspector

Attempt

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