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प्रश्न
What is a fire extinguisher ? What is the substance used in the modern type of fire extinguishers ? How is it an improvement over the soda acid-type and the foam-type fire extinguishers ?
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उत्तर
Fire Extinguisher— Fire extinguishers are a device in which carbon dioxide is produced in different forms for use as the extinguishing agent. It is a modem type of fire extinguisher in which liquid carbon dioxide is stored in a steel cylinder under pressure. Soda-acid and foam types of extinguisher cannot be used for extinguishing fire as they prepared in water, which conducts electricity and there can be short circuiting, causing another fire.
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संबंधित प्रश्न
Name the scientist who disproved the ‘vital force theory’ for the formation of organic compounds.
What is the general name of all the compounds made up of carbon and hydrogen?
Fill in the blank
................. is present in both living and non-living things.
State three ways by which carbon dioxide gas is added into the atmosphere.
Match the colunm
| column A | column B |
| 1. A product of incomplete burning | a. Hopcolite |
| 2. Nature of carben monoxide | b. Combustible gas |
| 3. A compound formed by the combination of haemoglobin and carbon monoxide | c. carboxy-haemoglobin |
| 4. A mixture of metallic oxides | d. Carbon monoxide |
| 5. Carbon monoxide | e. Highly poisonous |
FILL IN THE BLANK
Carbon atom has ................... electrons in its valence shell.
Select the appropeiate option of the following statement:
An allotrope of carbon obtained by burning kerosene oil in a limited supply of air.
About 18% of the weight of the human body is carbon.
There is more abundance of carbon on the earth.
Why is carbon monoxide harmful to health? (or) What happens when we breathe Carbon monoxide?
