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Metallurgical Engineering Foundry Metallurgy Difficulty: Medium

Riser is not required for the casting of

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The chemical potential of a component 1 in a solution is given by, μi = Which metal is extracted by leaching? Match the following ores with their chemical formula. Group 1 Group 2 P. Sphalerite 1. Cu 2 S Q. Covellite 2. CuS R. Anglesite 3. PbSO 4 S. Chalcocite 4. ZnS Which metals/alloys passivates spontaneously in acid solutions containing oxidizers or dissolved oxygen? The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about . . . . . . . . metres/second.