(D) Railway wagon axles are made by heating rods of iron embedded in charcoal powder. This process is known as case hardening.The process of hardening

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(D) Railway wagon axles are made by heating rods of iron embedded in charcoal powder. This process is known as case hardening.The process of hardening the surface of wrought iron by depositing a surface layer of steel on it is called case hardening. It is done by heating wrought iron in contact with carbonaceous materials like charcoal. This increases the carbon content on the surface,making it harder and more durable.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Mix Examples of General Principles and processes of Isolation of Elements

Easy

Railway wagon axles are made by heating iron rods embedded in charcoal powder. This process is known as:

A
Sherardising
B
Annealing
C
Tempering
D
Case hardening

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

General Principles and Processes of Isolation of Elements

Subtopic

Mix Examples of General Principles and processes of Isolation of Elements

Match List-$I$ with List-$II$ (Both having metallurgical terms):

List-$I$ List-$II$

$A$. Concentration of $Ag$ ore $I$. Reverberatory furnace

$B$. Blast furnace $II$. Pig iron

$C$. Blister copper $III$. Leaching with dilute $NaCN$ solution

$D$. Froth floatation method $IV$. Sulfide ores

Choose the correct answer from the options given below:

List-$I$	List-$II$
$A$. Concentration of $Ag$ ore	$I$. Reverberatory furnace
$B$. Blast furnace	$II$. Pig iron
$C$. Blister copper	$III$. Leaching with dilute $NaCN$ solution
$D$. Froth floatation method	$IV$. Sulfide ores

DifficultJEE MAIN 2021

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$A$ blast furnace is employed in the smelting of oxide ore with coke and flux in the metallurgy of:

Easy

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To obtain steel entirely free from sulphur and phosphorus,the process used is

Medium

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Match List-$I$ with List-$II$ and select the correct answer using the codes given below the lists :

List-$I$ List-$II$

$(a)$ van Arkel method $1$. Manufacture of caustic soda

$(b)$ Solvay process $2$. Purification of titanium

$(c)$ Cupellation $3$. Manufacture of $Na_2CO_3$

$(d)$ Poling $4$. Purification of copper

$ $ $5$. Refining of silver

Codes :

Medium

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In the reaction $4FeCr_2O_4 + 8Na_2CO_3 + 7O_2 \rightarrow X + Y + 8CO_2$,identify $X$ and $Y$.

Easy

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List-$I$	List-$II$
$(a)$ van Arkel method	$1$. Manufacture of caustic soda
$(b)$ Solvay process	$2$. Purification of titanium
$(c)$ Cupellation	$3$. Manufacture of $Na_2CO_3$
$(d)$ Poling	$4$. Purification of copper
$ $	$5$. Refining of silver

Railway wagon axles are made by heating iron rods embedded in charcoal powder. This process is known as:

Similar Questions

$A$ blast furnace is employed in the smelting of oxide ore with coke and flux in the metallurgy of:

To obtain steel entirely free from sulphur and phosphorus,the process used is

In the reaction $4FeCr_2O_4 + 8Na_2CO_3 + 7O_2 \rightarrow X + Y + 8CO_2$,identify $X$ and $Y$.

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