A) chromium B) silver C) bronze D) cadmium. Ans : (B)
A) Glucose B) Albumen C) Gelatine D) Any of above. Ans : (D)
A) corrosion B) decoration C) electrical contacts D) all of above. Ans : (A)
A) copper plating B) lead plating C) chromium plating D) none of the above. Ans : (C)
A) brass B) chromium C) lead D) zinc. Ans : (D)
A) electrolytic process B) oxidation C) rotating D) froth flotation. Ans : (A)
A) Distilled water B) Rectifier C) Barrel D) Carbon brushes. Ans : (B)
A) sodium cyanide, cadmium, and caustic soda B) cadmium hexa metaphosphate C) cadmium sulphate and sulphuric acid D) any of above. Ans : (A)
A) potassium nitrate solution B) dilute sulphuric acid C) done cyanide of silver and potassium solution D) any of above. Ans : (C)
A) smelting B) roasting C) electroplating D) any of the above processes. Ans (C)