Metallurgy — Important Questions
ICSE · Class 10 · Chemistry
43 important questions from Metallurgy for ICSE Class 10 Chemistry, with answers. Includes multiple choice and multiple correct questions.
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See them allImportant Questions from Metallurgy
Which methods are used for concentration of ores? (Select all correct answers)
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Hydraulic washing, Magnetic separation, Froth flotation
Hydraulic washing, magnetic separation, and froth flotation are all methods used for ore concentration. Electrolysis is used for metal extraction, not ore concentration.
In the Hall-Heroult process, which substance is used as electrolyte?
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Al₂O₃ + Na₃AlF₆ + CaF₂
In Hall-Heroult process, purified alumina (Al₂O₃) is dissolved in molten cryolite (Na₃AlF₆) with fluorspar (CaF₂) to lower melting point and increase conductivity.
Which metals can be extracted by electrolytic reduction? (Select all correct answers)
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Sodium, Aluminium, Potassium
Highly electropositive metals like Na, K, Al are extracted by electrolytic reduction. Iron and copper are less electropositive and can be reduced chemically.
Brass is an alloy of:
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Copper and zinc
Brass is an alloy containing 80% copper and 20% zinc. Bronze is copper and tin, steel is iron and carbon, solder is lead and tin.
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