Red glass contains trace amount of………..
(A) boron oxide
(B) Al2O3 and Fe2O3
(C) gold and copper
(D) zinc and aluminium
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Red glass contains trace amount of………..
(A) boron oxide
(B) Al2O3 and Fe2O3
(C) gold and copper
(D) zinc and aluminium
Red glass contains trace amount of………..
(A) boron oxide
(B) Al2O3 and Fe2O3
(C) gold and copper
(D) zinc and aluminium
Correct answer is: (C) gold and copper