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Question
Which of the following can be used to extinguish a fire caused by petrol?
1. Water
2. Sand
3. Carbon dioxide
1. Water
2. Sand
3. Carbon dioxide
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Solution
- Sand and carbon dioxide can be used to extinguish fire caused by inflammable liquids like petrol.
- Sand is a non-combustible substance. When sand is thrown over burning petrol, the sand covers it like a blanket. The sand cuts off the air supply to the burning petrol due to which the fire gets extinguished.
- Carbon dioxide, being heavier gas than oxygen, settles at the bottom and covers the burning fuel like a blanket. This cuts off the supply of oxygen to burning petrol due to which the fire gets extinguished.
- Water cannot extinguish fire involving oil because water is heavier than oil. So, it sinks below the oil, and oil keeps burning on the top.
- Sand and carbon dioxide can be used to extinguish fire caused by inflammable liquids like petrol.
- Sand is a non-combustible substance. When sand is thrown over burning petrol, the sand covers it like a blanket. The sand cuts off the air supply to the burning petrol due to which the fire gets extinguished.
- Carbon dioxide, being heavier gas than oxygen, settles at the bottom and covers the burning fuel like a blanket. This cuts off the supply of oxygen to burning petrol due to which the fire gets extinguished.
- Water cannot extinguish fire involving oil because water is heavier than oil. So, it sinks below the oil, and oil keeps burning on the top.
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