What is the purpose of enrichment of ore before extraction?
To remove impurities
Correct Answer: To remove impurities
Ores extracted from mines contain large amounts of unwanted materials called gangue (sand, clay, mud). Enrichment (concentration) of ore removes these impurities before smelting.
Common methods of ore enrichment:
- Gravity separation – denser ore particles separated from lighter gangue.
- Froth flotation – sulphide ores float in frothy mixture; gangue sinks.
- Magnetic separation – for magnetic ores like magnetite.
- Leaching – chemical dissolution of ore component.
Similar Questions
Which of the following statements are correct in relation to the extraction of metals? The metals which lie high in the reactivity series are extracted by the electrolysis of molten ore.
The metals of medium reactivity series exist as sulphides and carbonates in nature. It is easier to extract a metal from its sulphide in comparison to oxides.
What happens when acid is dissolved in water?
The molecular mass of carbon dioxide is:
Why do basic solutions conduct electricity when dissolved in water?
Which of the following is a characteristic feature of a suspension?
If the molecular mass of nitrogen gas (N2) is 28, what is the atomic mass of a single nitrogen atom?
Which of the following solutions has the lowest hydrogen ion concentration?
Molecules of compounds are formed by:
Which rule for writing chemical symbols is correct?
If you are given a transparent liquid that can conduct electricity and contains only one type of atom, what can you conclude?
Important Questions from Basic Concepts of Chemistry
Which of the following pair is correct?
I. Isotopes – different mass numbers
II. Isobars – different atomic numbers
Which of the following is a zone of a flame?
I. Dark
II. Luminous
III. Non-Luminous
Sphalerite is an ore of:
If formula of sodium salt of an anion X is \(Na_2X\) , then the formula of its aluminium salt would be
Which of the following set contains same number of molecules?
A. 1 gram O 2, 2 grams SO 2
B. 1 gram CO 2, 1 gram N 2O
C. 1 gram O 2, 1 gram O 3
