This set of Chemical Industry Multiple Choice Questions & Answers (MCQs) focuses on “Copper”.
1. Which among the following is an ore of copper?
a) Hematite
b) Magnetite
c) Chalcopyrite
d) Siderite
View Answer
Explanation: The predominant ore of copper is chalcopyrite (CuFeS2). Hematite, magnetite and siderite are ores of iron.
2. Which method is used to extract copper from sulphide ores?
a) Froth floatation
b) Leaching
c) Screening
d) Mechanical agitation
View Answer
Explanation: In froth floatation process, the ore is added to water and other reagents and is mechanically agitated forming bubbles. As the bubble rises it carries the copper along.
3. What are the steps involved in purifying copper? (In order of precedence)
a) Smelting-Roasting-Converting
b) Smelting-Converting-Roasting
c) Converting-Roasting-Smelting
d) Roasting-Smelting-Converting
View Answer
Explanation: Water is first removed by roasting. Steamed air is sent in to remove the volatile impurities. The final is conversion of matte.
Sanfoundry Global Education & Learning Series – Chemical Industry.
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