Principal alloying element in Elinvar (used for making hair springs for watches) is (A) Copper (B) Aluminium (C) Nickel (D) Zinc

Principal alloying element in Elinvar (used for making hair springs for
watches) is
(A) Copper
(B) Aluminium
(C) Nickel
(D) Zinc
by

1 Answer

Answer :

Option C
by

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