Give reasons : Sodium, potassium and lithium are stored under oil.
Give reasons : Sodium, potassium and lithium are stored under oil.
Sodium, potassium, and lithium are very reactive metals and react very vigorously with air as well as water. Therefore, they are kept immersed in kerosene oil in order to prevent their contact with air and moisture.
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What chemical process is used for obtaining a metal from its oxide ?
What chemical process is used for obtaining a metal from its oxide ?
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
Which metals do not corrode easily ?
Which metals do not corrode easily ?
Name two metals which are found in nature in the free state.
Name two metals which are found in nature in the free state.
Give reasons : Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Give reasons : Carbonate and sulphide ores are usually converted into oxides during the process of extraction.