
Pyrite ores are concentrated by which of the following methods?
(A) Calcination
(B) Roasting
(C) Froth Floatation Method
(D) Distillation
Answer
164.1k+ views
Hint: Think about all the processes one by one: calcination , roasting , froth floatation method and distillation. Think about the types of which can be concentrated calcination , roasting, froth floatation method and distillation.
Complete Step by Step Solution:
Let’s describe the froth floatation method .An aqueous sludge of the ground ore is treated with the frothing agent. sodium ethyl xanthate is an example used as a collector in the flotation of galena (example: lead sulphide) to separate it from sphalerite (e.g., zinc sulphide).
The ore particles attach with the polar part of xanthate and a hydrophobic layer from with the non-polar hydrocarbon part. air bubbles bring the particle to the water surface. hydrophobic action efficiency increases, but the increase in length of hydrocarbon chain in xanthates as the selectivity to ore type decreases.
It is highly selective to copper, nickel, lead, gold and zinc ores because the chain is the shortest in sodium ethyl xanthate. Normally Aqueous solutions (10%) with pH = 7–11 are used in the process. This pulp of hydrophobic particles and hydrophilic particles is introduced to tanks known as flotation cells that are aerated to produce bubbles. The hydrophobic particles attach to the air bubbles and by forming froth rise to the surface.
The froth is removed from the cell by producing a concentrate of the target mineral. It is the whole froth floatation process. So it's clear that for the froth flotation process ore is perfect for concentrating the pyrite ores.
Hence option C is the correct option.
Note: In general, the calcination process is used to concentrate carbonate ore, while roasting is utilised to concentrate sulphide ore. Distillation is used to concentrate metals having low boiling points, such mercury and zinc. The method of froth flotation is often utilised for ore that has greater density impurities. Sulphide ores are mostly concentrated using it.
Complete Step by Step Solution:
Let’s describe the froth floatation method .An aqueous sludge of the ground ore is treated with the frothing agent. sodium ethyl xanthate is an example used as a collector in the flotation of galena (example: lead sulphide) to separate it from sphalerite (e.g., zinc sulphide).
The ore particles attach with the polar part of xanthate and a hydrophobic layer from with the non-polar hydrocarbon part. air bubbles bring the particle to the water surface. hydrophobic action efficiency increases, but the increase in length of hydrocarbon chain in xanthates as the selectivity to ore type decreases.
It is highly selective to copper, nickel, lead, gold and zinc ores because the chain is the shortest in sodium ethyl xanthate. Normally Aqueous solutions (10%) with pH = 7–11 are used in the process. This pulp of hydrophobic particles and hydrophilic particles is introduced to tanks known as flotation cells that are aerated to produce bubbles. The hydrophobic particles attach to the air bubbles and by forming froth rise to the surface.
The froth is removed from the cell by producing a concentrate of the target mineral. It is the whole froth floatation process. So it's clear that for the froth flotation process ore is perfect for concentrating the pyrite ores.
Hence option C is the correct option.
Note: In general, the calcination process is used to concentrate carbonate ore, while roasting is utilised to concentrate sulphide ore. Distillation is used to concentrate metals having low boiling points, such mercury and zinc. The method of froth flotation is often utilised for ore that has greater density impurities. Sulphide ores are mostly concentrated using it.
Recently Updated Pages
JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Chemical Properties of Hydrogen - Important Concepts for JEE Exam Preparation

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

Atomic Structure - Electrons, Protons, Neutrons and Atomic Models

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Displacement-Time Graph and Velocity-Time Graph for JEE

Types of Solutions

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Chemistry In Hindi Chapter 1 Some Basic Concepts of Chemistry

JEE Advanced Weightage 2025 Chapter-Wise for Physics, Maths and Chemistry

Degree of Dissociation and Its Formula With Solved Example for JEE

NCERT Solutions for Class 11 Chemistry Chapter 7 Redox Reaction

Instantaneous Velocity - Formula based Examples for JEE
