A. Yellow B. White C. Brown D. Black
Vyanu Latest Questions
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A. Zinc blende B. White vitriol C. Blue vitriol D. Calamine
A. Au B. Mn C. Hg D. Ca
A. Iron pyrite B. Copper glance C. Cinnabar D. Cadmium sulphide
A. Stainless steel B. Nickel-chromium steel C. Cast iron D. Wrought iron
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A. Magnetic treatment B. Froth floatation C. Electrolysis D. Roasting
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A. Brass B. Invar C. Solder D. German silver
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A. Iron carbide B. Silicon carbide C. Silicon dioxide D. Graphite
A. Stainless steel B. Pig iron C. Solder D. German silver
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A. Tempering B. Nitriding C. Annealing D. None