Which of the reaction is suitable for concentrating ore by leaching process?
- \(2 Cu _2 S +3 O _2 \rightarrow 2 Cu _2 O +2 SO _2\)
- \(Fe _3 O _4+ CO \rightarrow 3 FeO + CO _2\)
- \(Al _2 O _3+2 NaOH +3 H _2 O \rightarrow 2 Na \left[ Al ( OH )_4\right]\)
- \(Al _2 O _3+6 Mg \rightarrow 6 MgO +4 Al\)
The Correct Option is C
Solution and Explanation
The suitable reaction for concentrating ore by leaching process is:
\(Al _2 O _3+2 NaOH +3 H _2 O \rightarrow 2 Na \left[ Al ( OH )_4\right]\)
This is because the reaction involves the conversion of the metal oxide (in this case, aluminum oxide) into a water-soluble form (sodium aluminate), which can be easily separated from the impurities in the ore through leaching. Leaching involves dissolving the desired metal compound using a suitable solvent, in this case, sodium hydroxide solution. This process allows for the concentration of the ore by selectively dissolving the desired metal compound while leaving behind the impurities.
So, the correct option is (C).
Top Questions on General Principles and Processes of Isolation of Elements
- The total energy of a gas mixture of one mole of oxygen and 3 moles of argon at a temperature \( T \) by neglecting vibrational modes is:
- KEAM - 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 body of mass \( M \) is at equilibrium under the action of four forces \( F_1, F_2, F_3 \), and \( F_4 \). If \( F_1 \) is removed from the body, then the body moves with an acceleration of:
- KEAM - 2024
- Physics
- General Principles and Processes of Isolation of Elements
- The incorrect statement about the Hall-Heroult process is:
- KCET - 2024
- Chemistry
- General Principles and Processes of Isolation of Elements
A parallel plate capacitor with plate area \(A\) and plate separation \(d = 2\) m has a capacitance of \(4\mu F\). The new capacitance of the system if half of the space between them is filled with a dielectric material of dielectric constant \(K = 3\) (as shown in the figure) will be:
- BITSAT - 2024
- Physics
- General Principles and Processes of Isolation of Elements
Questions Asked in JEE Main exam
- Let \( y = f(x) \) be the solution of the differential equation\[\frac{dy}{dx} + \frac{xy}{x^2 - 1} = \frac{x^6 + 4x}{\sqrt{1 - x^2}}, \quad -1 < x < 1\] such that \( f(0) = 0 \). If \[6 \int_{-1/2}^{1/2} f(x)dx = 2\pi - \alpha\] then \( \alpha^2 \) is equal to __________.
- JEE Main - 2025
- Differential equations
- Marks obtained by all the students of class 12 are presented in a frequency distribution with classes of equal width. Let the median of this grouped data be 14 with median class interval 12-18 and median class frequency 12. If the number of students whose marks are less than 12 is 18, then the total number of students is:
- JEE Main - 2025
- Statistics
- Let the system of equations $ x + 5y - z = 1 $ $ 4x + 3y - 3z = 7 $ $ 24x + y + \lambda z = \mu $ where $ \lambda, \mu \in \mathbb{R} $, have infinitely many solutions. Then the number of the solutions of this system, if $x, y, z$ are integers and satisfy $7 \leq x + y + z \leq 77$, is:
- JEE Main - 2025
- Linear Systems and Determinants
- A force of 49 N acts tangentially at the highest point of a sphere (solid of mass 20 kg) kept on a rough horizontal plane. If the sphere rolls without slipping, then the acceleration of the center of the sphere is:
- JEE Main - 2025
- Quantum Mechanics
Match List-I with List-II: List-I
- JEE Main - 2025
- Classification Of Organic Compounds
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