Advertisements
Advertisements
प्रश्न
It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain
Advertisements
उत्तर
It is difficult to burn a heap of green leaves but dry leaves catch fire easily because green leaves contain a lot of water. This absorbs the heat given to burn them and evaporates and does not let the temperature of the leaves rise to their ignition temperature. Due to this, green leaves do not catch fire until all the water evaporates and their temperature reaches their ignition temperature.
Dry leaves catch fire quickly because of the absence of water because the heat given to burn them quickly raises their temperature to their ignition temperature and they start burning.
संबंधित प्रश्न
Fire produced by oil cannot be controlled by ______.
Give reasons.
Water is not used to control fires involving electrical equipment.
Explain how CO2 is able to control fires.
Which zone of a flame does a goldsmith use for melting gold and silver and why?
Fire produced by oil cannot be controlled by ______.
Choose the correct statement about inflammable substances from the following.
They have
When the clothes of a person catch ______ the person is covered with a ______ to extinguish fire.
Some words (underlined) in the following sentence is jumbled up. Write them in their correct form.
Chittsmack does not burn by itself.
State whether the following statement is True or False.
Carbon dioxide is an excellent fire extinguisher.
Mention the conditions necessary for producing fire.
