NCERT Solution for Class Tenth Science Chapter 3
Metals and Non-metals
CBSE NCERT Book Session-2022-2023
Intext Questions
Page No-46
Questions No-1
Why is sodium kept immersed in kerosene oil?
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Sodium is a highly reactive metal that reacts vigorously with water and even moisture in the air. When sodium comes into contact with water, it undergoes a violent reaction, producing hydrogen gas and heat. This reaction is highly exothermic and can lead to a fire hazard.
To prevent sodium from reacting with moisture in the air, it is often stored immersed in a non-reactive substance, such as kerosene oil. Kerosene forms a protective layer around the sodium, preventing it from coming into contact with water vapor or atmospheric moisture. This helps to minimize the risk of uncontrolled reactions and fires.
The use of kerosene oil or other inert substances for storing reactive metals is a common practice in laboratories and industrial settings where such metals are used. It ensures the safe handling and storage of these materials.
Sodium is highly reactive metal so it combines with air as well as water to form sodium oxide and hydrogen gas with heat energy.this heat is sufficient to burn hydrogen gas. That’s why it catches fire if kept in open. Therefore, to prevent sodium from combining with air and accidental fires, sodium is stored in kerosene oil.
Metals such as potassium and sodium react so vigorously that they catch fire if kept in the open. Hence, to protect them and to prevent accidental fires, they are kept immersed in kerosene oil.
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