Question
Sodium is always kept in kerosene.
✓
Answer
(i) Sodium is a highly reactive metal.
(ii) It reacts with the water vapour present in air to form sodium hydroxide and hydrogen.
(iii) Hydrogen released catches fire in presence of oxygen due to liberation of heat during this reaction.
(iv) Sodium does not react with Kerosene and it sinks in it.
(v) Thus to prevent sodium from coming in contact with air it is immersed in kerosene.
(ii) It reacts with the water vapour present in air to form sodium hydroxide and hydrogen.
(iii) Hydrogen released catches fire in presence of oxygen due to liberation of heat during this reaction.
(iv) Sodium does not react with Kerosene and it sinks in it.
(v) Thus to prevent sodium from coming in contact with air it is immersed in kerosene.
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Disasters can be properly classified into three categories, viz. natural disasters, technological disasters and man-made disasters. The forces that cause natural disasters cannot be controlled. Moreover, they are becoming more frequent in the current years due to phenomena of climate change. On and off incidences of cyclones, cloud bursting, floods, etc. am creating havoc in the lives of people. Technological disasters are due to improper and callous behaviour at the different processes carried out in technical establishments. Man-made disasters are conflicts arising due to different religions, regions and-terrorism.
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Disasters can be properly classified into three categories, viz. natural disasters, technological disasters and man-made disasters. The forces that cause natural disasters cannot be controlled. Moreover, they are becoming more frequent in the current years due to phenomena of climate change. On and off incidences of cyclones, cloud bursting, floods, etc. am creating havoc in the lives of people. Technological disasters are due to improper and callous behaviour at the different processes carried out in technical establishments. Man-made disasters are conflicts arising due to different religions, regions and-terrorism.
1.What are three broad areas of disasters?
2.Which disasters cannot be controlled? Why?
3.Which type of disasters were very common in Western Maharashtra in recent times? Why?
4.Give any one example of technological disaster that shook the entire India.
5.Which types of disasters can be controlled in order to lead happy, peaceful and secured life? How?