Oxide layer formed on the non-ferrous metal surface after its annealing is (A) Removed by acid pickling (B) Hammered into the surface (C) Removed with coarse emery cloth

Oxide layer formed on the non-ferrous metal surface after its annealing
is
(A) Removed by acid pickling
(B) Hammered into the surface
(C) Removed with coarse emery cloth
by

1 Answer

Answer :

Option A
by

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