1.

    In the leaching of gold with cyanide, the role of oxygen is BEST described as:

    A

    Reducing agent, converting gold ions to metallic gold.

    B

    Complexing agent, directly forming a soluble gold complex.

    C

    Oxidizing agent, facilitating the formation of a soluble gold complex.

    D

    Catalyst, speeding up the dissolution process without being consumed.

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Understanding
    🎯Difficulty :Hard
    ⚡ Time Required :1.5 mins
    🔄Ncert Concepts :Concentration Methods of Ores, Leaching, Gold Extraction

    Related Questions

    1.

    Which among the following is an oxide ore of metal?

    A

    Zincite

    B

    Sphalerite

    C

    Calamine

    D

    Copper glance

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Oxide ores, mineralogy, metal extraction

    2.

    Which among the following is a carbonate ore of a metal?

    A

    Bauxite

    B

    Calamine

    C

    Cuprite

    D

    Sphalerite

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :carbonate ores, mineral identification, chemical composition

    3.

    In the froth flotation process, the role of the depressant is to:

    A

    Prevent certain sulphide ores from being collected in the froth

    B

    Stabilize the froth

    C

    Increase the wettability of the ore

    D

    Increase the density of the gangue

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Froth Flotation, Depressants, Sulphide Ores

    4.

    Which method is most suitable for concentrating an ore containing iron oxide?

    A

    Magnetic Separation

    B

    Froth Flotation

    C

    Leaching

    D

    Liquation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Magnetic Separation, Iron Ore, Concentration Methods

    5.

    In which method is the ore dissolved selectively using a suitable reagent?

    A

    Leaching

    B

    Froth flotation

    C

    Magnetic separation

    D

    Gravity separation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Leaching

    6.

    Which method is MOST suitable for concentrating an ore containing cassiterite (SnO2) contaminated with wolframite (FeWO4)?

    A

    Froth flotation

    B

    Magnetic separation

    C

    Handpicking

    D

    Gravity separation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Concentration Methods of Ores, Magnetic Separation

    7.

    Leaching is a preferred method for concentrating ores rich in:

    A

    Aluminum

    B

    Iron

    C

    Zinc

    D

    Lead

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Leaching, Bauxite, Aluminum Extraction

    8.

    In the concentration of cassiterite (SnO2_2), which method is employed to remove lighter gangue particles like clay and sand?

    A

    Gravity Separation

    B

    Froth Flotation

    C

    Magnetic Separation

    D

    Leaching

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Gravity Separation, Cassiterite, Concentration Methods

    9.

    Which of the following ores is concentrated using magnetic separation after roasting?

    A

    Bauxite

    B

    Copper pyrites

    C

    Galena

    D

    Cinnabar

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Concentration Methods of Ores, Roasting, Magnetic Separation

    10.

    Which among the following is a carbonate ore ?

    A

    Corundum

    B

    Copper glance

    C

    Siderite

    D

    Magnetite

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:General Principles And Processes Of Isolation Of Elements
    🎯Topic:Concentration Methods Of Ores
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :carbonate ores, mineralogy

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