Metallurgy Mock Tests

18 questions available

Metallurgy Mock Test 1

Questions: 18

Sample Questions

EAPCET Chemistry

In the Hall-Heroult process for aluminium extraction, what is the role of Na₃AlF₆ (cryolite)?

A Provides Al³⁺ ions for deposition

B Oxidises carbon anode to CO₂

C Lowers the melting point of Al₂O₃ and increases conductivity

D Acts as a catalyst in the reduction of Al₂O₃

EAPCET Chemistry

The process of extracting metal from its ore in a fused state is called:

A Refining

B Pyrometallurgy

C Hydrometallurgy

D Electrometallurgy

EAPCET Chemistry

According to the Ellingham diagram, which of the following reducing agents can reduce Cu₂O to Cu at temperatures below 1000 K?

A C (carbon)

B CO (carbon monoxide)

C Al (aluminium)

D H₂ (hydrogen)

EAPCET Chemistry

The ore that contains both iron and copper is:

A Bauxite

B Copper pyrites (CuFeS2)

C Magnetite

D Haematite

EAPCET Chemistry

In the Hall-Heroult process for aluminium extraction, what is the role of Na₃AlF₆ (cryolite)?

A It acts as an oxidising agent

B It lowers the melting point of Al₂O₃ and increases conductivity

C It oxidises carbon anodes

D It removes iron impurities

EAPCET Chemistry

The reducing agent used in the extraction of iron in a blast furnace is:

A CO (carbon monoxide)

B Carbon (coke)

C Hydrogen

D Aluminium

EAPCET Chemistry

Which of the following methods is used for the purification of metals that have a low melting point and are volatile?

A Zone refining

B Liquation

C Electrolytic refinement

D Vapour phase refining

EAPCET Chemistry

In the extraction of aluminium, bauxite is purified by dissolving in concentrated NaOH. This process is based on:

A Amphoteric nature of Al2O3

B Acidic nature of Al2O3

C Reducing nature of Al2O3

D Basic nature of Al2O3

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