Home
Class 12
CHEMISTRY
Consider the following statements in the...

Consider the following statements in the extraction of iron from haematite:
(I) `CO`is the main reducing agent
(II) `Fe_(2)O_(3)`is used to oxidise the impurities be Bessemer process
(III) In basic oxygen process, air is used to oxidise the impurities.
(IV) When air is used to oxidise the impurities, iron nitride is formed in iron
Pick the correct set of statement `(s)`:

A

`I,IV`

B

`I,II`

C

`I,II`and`III`

D

`I,II`and`IV`

Text Solution

Verified by Experts

The correct Answer is:
A
In `BOP` (Basic oxygen process), impurities in iron are oxidised by pure oxygen.
If impurity is oxidised by air, small amout of `Fe` changes to `Fe_(3)N`.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS

    A2Z|Exercise Assertion-Reasoning Questions|3 Videos

  • ELECTROCHEMISTRY

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • MOCK TEST

    A2Z|Exercise Mock Test 2|45 Videos

Similar Questions

Explore conceptually related problems

Consider the following statements : S_(1) : In extration of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace. S_(2) : Calamine in an carbonate ore of zince. S_(3) : The principle ore of aluminium , bauxite , usually contains silica, iron oxides and titanium oxide as impurities. S_(4) : Solidified copper obtained from silica lined conventor ( Bessemer converter ) has blistered appearance due to the evolution of SO_(2) . and arrange in the order of true // false.

Calcium silicate (slag) formed in the slag formation zone is extraction of iron from haematite ore I. does not dissolve in molten iron II. being lighter floats on the moltern iron III. Is used in cement industry IV. prevents the re-oxidation of molten iron

Knowledge Check

  • Pure O_(2) instead of air is used to oxidise the pig iron because:

    A
    Molten metal took up small amount of nitrogen which makes the steel brittle
    B
    Air is not as efficient to oxidise all the impurities to their respective oxides
    C
    Air contains moisture and will precipitate iron as `Fe_(2)O_(3)`
    D
    Iron reacts with air to `FeCO_(3)`

  • Pure O_(2) instead of air is used to oxidise the pig iron because:

    A
    Molten metal took up small amount of nitrogen which makes the steel brittle
    B
    Air is not as efficient to oxidise all the impurities to their respective oxides
    C
    Air contains moisture and will precipitate iron as `Fe_(2)O_(3)`
    D
    Iron reacts with air to `FeCO_(3)`

  • Consider the following statement: Statement-1: In extraction of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace. Statement-2:Calamine is an carbonate ore of zinc. ltbr Statement-3: The principle opre of aluminium, bauxite, usually contains silica, iron oxides and titanium, oxide as impurities. Statement-4:Solidified copper obtained from silica lined convertor (Bessemer converter) has blistered appearance due to the evolution of SO_(2) and arrange in the order of true/false.

    A
    FTTT
    B
    FTFF
    C
    FFTT
    D
    TFFT

    • Similar Questions

    Explore conceptually related problems

    Consider the following statements, I. Fluorine forms two oxides OF_(2)" and "O_(2)F_(2) . II. OF_(2) is thermodynamically stable at 298 K. III. O_(2)F_(2) oxidises plutonium to PuF_(6) . The correct set of statements is,

    Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide. (II) It is an exothermic process. (III) It is used for the concentration of sulphide ore. (Iv) It removes easily oxidisable volatile impurities present in the concentrated ore.

    Statement-1: Aluminium is used as reducing agent in the commercial extraction of iron from haematite ore. Statement--2: Reduction of B_(2)O_(3) to boron by aluminuim is called as Goldschmidt aluminothermicprocess.

    Read the following statements :- (I) Al has greater affinity than that of Cr, for oxygen (II) Al can be used for reduction of Fe_(2)O_(3) (III) Carbon is used for reduction of copper oxide (CuO) (IV) SnO_(2) can be reduced by carbon Choose the correct set of statement(s)

    Consider following statements – (i) Froth floatation technique is used to concentrate sulphide ore. (ii) Froth floatation technique is based upon differential wettability of ore and impurity in water. (iii) Red Bauxite is concentrated by Bayer's process (iv) Carbon is used as reducing agent during extraction of zinc from zinc blende. Correct statements are –

    Home
    Profile