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What is the principle of thermite process ? Name two mealswhich canbe extractedwiththe help of this process.

Answer»

Solution :Thermite isa mixtureofaluminiumpowder andferricoxide. When this MIXTUREIS ignited, Al reduces`Fe_2O_3`to Fe whileit itselfgetsoxidisedto` Al_2 O_3 `.This iscalledthermite process.
` "" 2Al (s)+Fe_2 O _ 3 (s)overset("Ignite ") to Al_2O _ 3 (s)+Fe (L) `
Theunderlyingprincipleof thermiteprocess is that` Delta_f G ^(@) ` of` Al_2 O _3`is much more negativethat that of`Fe _2 O _ 3 `.Besides, Fe, two other metalswhich canbe extractedbythermiteprocess areCr and MN.
` ""Cr_2O_3 +2 Al toAl_2 O _ 3+2 CR`
` ""3 Mn_3O_4 +8 Al to4Al_2O_3 +9 Mn `


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