Blast Furnace Process

Q.

The purest form of iron is

1. Pig iron

2. Wrought iron

3. Cast iron

4. Steel

Q.

How is iron extracted from hematite?

Q.

Classify iron on the basis of their carbon content present in them?

Q.

The most impure and pure forms of iron respectively are:

1. Pig iron, Cast iron

2. Cast iron, Wrought iron

3. Wrought iron, Pig iron

4. Wrought iron, Cast iron

Q.

Give the reaction involved during the extraction of zinc from its ore by :

(1) roasting of zinc ore

(2) calcination of zinc ore

Q.

Process of heating the ores strongly in presence of oxygen, during which sulfide is converted to an oxide is called roasting.

1. True

2. False

Q.

Iron (Fe) can be refined by electrorefining process.

1. True

2. False

Q. ______ is the process of heating the ore at a temperature below its melting point in excess of air or oxygen.

1. Calcination
2. Roasting
3. Electrolysis
4. Reduction

Q. What are the zones in the blast furnace during extraction of Fe?

Q.

Calcination is a process in which ore is heated in the absence of air. As a result of which the ___ ore is converted into its oxide.

1. No of protons

2. No of neutrons

3. No of electrons

4. Sum of Electrons and protons

Q. Heating of sulphide ores in the presence of oxygen is termed as:

1. roasting
2. calcination
3. leaching
4. levigation

Q.

__ is a type of iron which contains 0.1% to 0.5% impurity and is used for making nuts and bolts.

Q. Which of the following is obtained during the roasting process?

1. Metal sulphate
2. Metal oxide
3. Metal chloride
4. Metal fluoride

Q. ______ is the process of heating the concentrated ore at a temperature below its melting point in excess of air or oxygen.

1. Calcination
2. Roasting
3. Electrolysis
4. Smelting

Q. ______ is the process of heating the concentrated ore at a temperature below its melting point in the presence of air inorder to convert it into its oxide ore.

1. Calcination
2. Roasting
3. Electrolysis
4. Leaching

Q.

The most impure and pure forms of iron respectively are:

1. Pig iron, Cast iron

2. Cast iron, Wrought iron

3. Wrought iron, Pig iron

4. Wrought iron, Cast iron

Q. ______ is the process of heating the concentrated ore at a temperature below its melting point in the presence of air inorder to convert it into its oxide ore.

1. Electrolysis
2. Smelting
3. Roasting
4. Calcination

Q. ______ is the process of heating the concentrated ore at a temperature below its melting point in the presence of air inorder to convert it into its oxide ore.

1. Calcination
2. Roasting
3. Electrolysis
4. Leaching

Q. The molten iron has 4% carbon and other impurities like manganese, silicon, phosphorus, etc. This is called:

1. Wrought iron
2. Pig iron
3. Cast iron
4. Raw iron

Q. Match the following types of iron with their use.

1. Industrial purpose
2. Sewage pipes
3. Electromagnets

Q. Arrange the zones in increasing order of their temperature in the blast furnace during extraction of Fe.

1. Oxide-reduction
2. Slag formation
3. Fusion
4. Combustion

Q. Match the zones of blast furnace used in refining of iron with the respective reaction happening in them.

1. $F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$
2. $CaO+Si{O}_2\to CaSi{O}_3$
3. $C+O_2\to C{O}_2$

Q. Match the zones of blast furnace used in refining of iron with the respective reaction happening in them.

1. $F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$
2. $CaO+Si{O}_2\to CaSi{O}_3$
3. $C+O_2\to C{O}_2$

Q. ______ is a process of heating the concentrated ore at the temperature below its melting point in the presence of air.

1. Calcination
2. Leaching
3. Electrolysis
4. Roasting

Q. The molten iron has 4% carbon and other impurities like manganese, silicon, phosphorus, etc. This is called:

1. Wrought iron
2. Pig iron
3. Cast iron
4. Raw iron

Q. Which of the following alloy has the least percentage of iron?

1. Wrought Iron

2. Pig Iron

3. Mild Steel

4. Steel

Q.

Which of the following statements are not true with respect to the production of iron?

1. The oxide ore is primarily reduced to iron by solid coke.
2. The oxide ore reduced largely by carbon monoxide.
3. Major silica impurities are removed as calcium silicate slag.
4. The silicate slag is used in manufacture of cement.