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Assertion: Dressing of ore is an essenti...

Assertion: Dressing of ore is an essential step in metal extraction
Reason: Dressing of ore is done to improve the physical appearance of ore

A

If both Assertion & Reason are true and the Reason is the correct explanation of the Assertion

B

If both Assertion and reason are true but the Reason is not the correct explanation of the Assertion

C

If Assertion is true statement but Reason is false

D

If both Assertion and Reason are false statements

Text Solution

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Assertion: If pure haematite is used as an ore for iron extraction, there is no need of roasting Reason: In the extraction of iron, final product in roasting is Fe_2O_3

Names of some minerals are given below. .i) Haematite ii) bauxite iii) Dolomite a. Identify the mineral of Iron (Fe) b. Name the reducing agent mainly used in the extraction of iron from its ore. c. What is the role of powdered lime stone in the extraction process of iron?

Knowledge Check

  • Extraction of metal from the ore cassiterite involves

    A
    Carbon reduction of an oxide ore
    B
    Self-reduction of sulphide ore
    C
    Removal of copper impurity
    D
    Removal of iron impurity

  • Assertion : Usually the sulphide ore is converted to oxide before reduction. Reason : Reduction of oxides occurs easier.

    A
    If both (A) and (R) are correct and (R) is the correct explanation of(A).
    B
    If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
    C
    If (A) is correct, but (R) is incorrect.
    D
    If both (A) and (R) are incorrect.

  • In the cyanide extraction process of silver from argentite ore, the oxidising and reducing agents are

    A
    `O_2 and CO` respectively
    B
    `O_2` and Zn respectively
    C
    `HNO_3` and Zn dust respectively
    D
    `HNO_3` and CO respectively

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    Assertion : Carbonate and hydroxide ores are concentrated by froth floatation process. Reason : In froth floatation process, mineral oil is used because it preferentially wets the gangue particles.

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