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Mr. Dubey • 52.30K Points
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Q. Which of the following welding process in which heat is produced for welding by a chemical reaction?

(A) resisting welding
(B) thermit welding
(C) forge welding
(D) gas welding
Correct : Option (B)

Explanation: 
 the thermite process is a chemical reaction in which a metal oxide (preferably molten) is displaced by another molten metal which is more reactive than the metal in the metal oxide, releasing a lot of heat. example:

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