Assertion (A): Aluminum is a universal accepted metal for a large number of
industries.
Reason (R): Aluminum is flexible and a good conductor of heat and electricity
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Aluminum is chosen as metal for thermite welding since it has a strong affinity towards oxygen and its oxide, Al
2
O
3
is a highly exothermic compound. A common thermite contains ferric oxide and aluminum in 3:1 ratio by mass. Hence, it is used in thermite welding of broken iron parts.
It is also true that Aluminium ores are concentrated by the method of chemical separation but it is not the correct reason why Aluminium is used for thermite welding.
Hence, If both assertion and reason are CORRECT, but the reason is NOT THE CORRECT explanation of the assertion
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