write thermit reaction and also mention its use in daily life
Answers
Thermite process :
When highly reactive metals such as Sodium, Calcium, Aluminium etc., are used as reducing agents they displace metals of lower reactivity from the com-pound.
These are exothermic reactions.
The amount of heat evolved is so large that the metals produced in molten state.
The reaction of iron oxide with aluminium is used to join railing of railway tracks or cracked machine parts. This reaction is known as the thermite reaction.
Applications of thermite reaction in daily life :
To join railings of railway tracks.
To join cracked machine parts.
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Thermite process is very useful for the welding of broken metal parts. When Aluminum powder reacts with iron oxide or chromium oxide, a large amount of heat is released and about a temperature of 3500oC is attained which is enough to weld broken metallic parts