Extraction of zinc from zinc blende is achieved by
- electrolytic reduction
- roasting followed by reduction with carbon
- roasting followed by reduction with anothermetal
- roasting followed by self reduction
The Correct Option is B
Approach Solution - 1
The correct answer is Option is B) roasting followed by reduction with carbon
Zinc blende contains ZnS which is first roasted partially and then subjected to reduction with carbon
\(ZnS+O_2 \rightarrow ZnO+SO_2 Roasting\)
\(ZnO+C \xrightarrow{\Delta} Zn+CO \uparrow Carbon reduction\)
Read more from the chapter: General Principles and Processes of Isolation of Elements
Approach Solution -2
The correct answer is Option is B) roasting followed by reduction with carbon
Real Life Applications
The real-life applications of extracting zinc from zinc blende are as follows:
- Zinc is widely used in die casting.
- The process of galvanization also uses zinc. The steel is coated with zinc which prevents them from rusting.
- Zinc is also used in batteries and abrasives.
Question can also be asked as
- How is zinc extracted from zinc blende?
- What are the different methods of extracting zinc from zinc blende?
- Write the steps involved during the extraction of zinc from zinc blende.
Approach Solution -3
The correct answer is Option is B) roasting followed by reduction with carbon
Raw metals are obtained with the help of extraction from their concentrated ore. Ore is the mixture in which the metal is present in its original state. The metals have to be refined with the help of reducing agents. The three important steps in this process are:
- Concentration of ore
- Isolation of metal from the ore
- Purifying the metal
Conversion of the concentrated ores
The concentrated ores need to be converted into their oxides for further processing. The concentrated ore is in its carbonated form. The process that can convert the ores into their oxides is as follows:
- Calcination
- Roasting
Reduction of oxides to metal
The metal oxides are reduced to their free metals using reducing agents. The process of reductio occurs at a low temperature. The processes of reduction are:
- Smelting
- Reduction by water gas
- Reduction by hydrogen
- Alumino Thermite Process
- Auto reduction
For extraction of Zn from ZnS
- The ore is crushed and then concentration is done using the froth-floatation method.
- Then the roasting of the ore is done in the presence of air. It is done at 1200K.
- Then ZnO is reduced to Zn metal with the help of powdered coke and after heating in a fire clay retorts.
- Electrolytic refining is used for the purification of Zn metal
Read more:
| Related concepts | ||
|---|---|---|
| Carbonate | Hydrate oxides | Bauxite ore |
| Roasting | Reduction | Iron |
Top Questions on General Principles and Processes of Isolation of Elements
- Which of the following compounds is used to cover the surface of a metallic object to prevent corrosion?
- KEAM - 2025
- Chemistry
- General Principles and Processes of Isolation of Elements
A block of mass 1 kg is pushed up a surface inclined to horizontal at an angle of \( 60^\circ \) by a force of 10 N parallel to the inclined surface. When the block is pushed up by 10 m along the inclined surface, the work done against frictional force is:
[Given: \( g = 10 \) m/s\( ^2 \), \( \mu_s = 0.1 \)]
- BITSAT - 2024
- Physics
- General Principles and Processes of Isolation of Elements
- A particle of mass \( 2 \) kg is on a smooth horizontal table and moves in a circular path of radius \( 0.6 \) m. The height of the table from the ground is \( 0.8 \) m. If the angular speed of the particle is \( 12 \) rad/s, the magnitude of its angular momentum about a point on the ground right under the center of the circle is:
- BITSAT - 2024
- Physics
- General Principles and Processes of Isolation of Elements
A gas can be taken from A to B via two different processes ACB and ADB. When path ACB is used, \( 60 J \) of heat flows into the system and \( 30 J \) of work is done by the system. If path ADB is used, the work done by the system is \( 10 J \). The heat flow into the system in path ADB is:
- BITSAT - 2024
- Physics
- General Principles and Processes of Isolation of Elements
- An oil drop of radius \(1 \, \mu{m}\) is held stationary under a constant electric field of \(3.65 \times 10^4 \, {N/C}\) due to some excess electrons present on it. If the density of the oil drop is \(1.26 \, {g/cm}^3\), then the number of excess electrons on the oil drop approximately is:
[Take, g = 10 m/s2]- BITSAT - 2024
- Physics
- General Principles and Processes of Isolation of Elements
Questions Asked in JEE Advanced exam
- Let $ x_0 $ be the real number such that $ e^{x_0} + x_0 = 0 $. For a given real number $ \alpha $, define $$ g(x) = \frac{3xe^x + 3x - \alpha e^x - \alpha x}{3(e^x + 1)} $$ for all real numbers $ x $. Then which one of the following statements is TRUE?
- JEE Advanced - 2025
- Fundamental Theorem of Calculus
- At 25$^\circ$C, the concentration of H$^+$ ions in $ 1.00 \times 10^{-3} \, \text{M} $ aqueous solution of a weak monobasic acid having acid dissociation constant $ K_a = 4.00 \times 10^{-11} $ is $ X \times 10^{-7} \, \text{M} $. The value of $ X $ is ____. {Use: Ionic product of water $ K_w = 1.00 \times 10^{-14} $ at 25$^\circ$C
- JEE Advanced - 2025
- Ionic Equilibrium
- Consider the vectors $$ \vec{x} = \hat{i} + 2\hat{j} + 3\hat{k},\quad \vec{y} = 2\hat{i} + 3\hat{j} + \hat{k},\quad \vec{z} = 3\hat{i} + \hat{j} + 2\hat{k}. $$ For two distinct positive real numbers $ \alpha $ and $ \beta $, define $$ \vec{X} = \alpha \vec{x} + \beta \vec{y} - \vec{z},\quad \vec{Y} = \alpha \vec{y} + \beta \vec{z} - \vec{x},\quad \vec{Z} = \alpha \vec{z} + \beta \vec{x} - \vec{y}. $$ If the vectors $ \vec{X}, \vec{Y}, \vec{Z} $ lie in a plane, then the value of $ \alpha + \beta - 3 $ is ________.
Two identical concave mirrors each of focal length $ f $ are facing each other as shown. A glass slab of thickness $ t $ and refractive index $ n_0 $ is placed equidistant from both mirrors on the principal axis. A monochromatic point source $ S $ is placed at the center of the slab. For the image to be formed on $ S $ itself, which of the following distances between the two mirrors is/are correct:
- JEE Advanced - 2025
- Ray optics and optical instruments
- Let $$ \alpha = \frac{1}{\sin 60^\circ \sin 61^\circ} + \frac{1}{\sin 62^\circ \sin 63^\circ} + \cdots + \frac{1}{\sin 118^\circ \sin 119^\circ}. $$ Then the value of $$ \left( \frac{\csc 1^\circ}{\alpha} \right)^2 $$ is \rule{1cm}{0.15mm}.
- JEE Advanced - 2025
- Some Applications of Trigonometry
JEE Advanced Notification
Concepts Used:
General Principles and Processes of Isolation of Elements
What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –
- Concentration of the ore
- Isolation of the metal from its concentrated ore
- Purification of the metal