General Principles & Processes of Isolating Elemen
Get insights from 111 questions on General Principles & Processes of Isolating Elemen, answered by students, alumni, and experts. You may also ask and answer any question you like about General Principles & Processes of Isolating Elemen
Follow Ask QuestionQuestions
Discussions
Active Users
Followers
New answer posted
4 months agoContributor-Level 10
Copper matte contains Cu2S and FeS. When a blast of hot air is passed through molten matte took in a silica lined convertor, FeS present in matte is oxidized to FeO which combines with Silica (SiO2) to form FeSiO3, slag.
When the whole of iron has been removed as slag, some of the Cu2S undergoes oxidation to form Cu2O which then reacts with more Cu2O to form copper metal.
New answer posted
4 months agoContributor-Level 10
The naturally occurring substances in the form of which metals occur in the earth's crust along with impurities are called as minerals. The mineral from which the metal can be extracted conveniently and profitably is called as an ore. Thus, all ores are minerals but all minerals are not ores. For example, aluminium occurs in earth's crust in the form of bauxite and clay. Out of these two minerals, aluminium can be conveniently and economically extracted from the bauxite. Therefore, bauxite is the ore of aluminium. Similarly, Zinc can be obtained from blende (ZnS), calamine (ZnCO3), Zincite (ZnO) etc.
Thus these minerals are called ores
New answer posted
4 months agoContributor-Level 10
The iron obtained from blast furnaces is known as pig iron. It contains around 4% carbon and many impurities such as S, P, Si, Mn in smaller amounts.
Cast iron is obtained by melting pig iron and coke using a hot air blast. It contains a lower amount of carbon (3%) than pig iron, cast iron is extremely hard and brittle.
New question posted
4 months agoNew answer posted
4 months agoContributor-Level 10
To separate alumina from silica in bauxite ore associated with silica, firstly, the powdered ore is digested with a concentrated NaOH solution at a temperature of 473 – 523K and 35 – 36 bar pressure. This results in the leaching out of alumina (Al2O3) as sodium aluminate and silica (SiO2) as sodium silicate leaving the impurities behind.
Al2O3 (s) + 2NaOH (aq) + 3H2O (l) → 2 Na [Al (OH)4] (aq)
SiO2 + 2NaOH (aq)→ Na2SiO3 (aq) + H2O (l)
After this, CO2 gas is passed through the resultant solution to neutralize the alumina present in the solution, this results in the precipitation of hydrated samples of alumina. To include precipitat
New answer posted
4 months agoContributor-Level 10
Nickel is refined by Mond's process. In this process, nickel is heated in the presence of carbon monoxide to form nickel tetracarbonyl, which is a volatile complex.
New answer posted
4 months agoContributor-Level 10
The components selected for the stationary phase should have different solubility's in the phase, only then it is selected as the stationary phase. Hence, different components have different rates of movement through the stationary phase; as a result, can be separated from each other.
New answer posted
4 months agoContributor-Level 10
Chromatography is a term used for numerous laboratory techniques for the separation of mixtures. The term is derived from Greek word 'chroma' meaning 'color' and 'graphein' meaning 'to write'. Chromatographic techniques are based on the principles that different components are adsorbed differently on an adsorbent. There are various chromatographic techniques used such as paper chromatography, column chromatography, gas chromatography, etc.
New answer posted
4 months agoContributor-Level 10
During the roasting of pyrite ore, a mixture of FeO and Cu2O is obtained.
2 CuFeS2 + O2→ Cu2S + 2 FeS + SO2
2 Cu2S + 3 O2 → 2 Cu2O + 2 SO2
2 FeS + 3 O2 → 2 FeO + 2 SO2
The role of silica in the metallurgy of copper is to remove the iron oxide obtained during the process of roasting as 'slag'. If the sulphide ore of copper iron, then silica (SiO2) is added as a flux before roasting. Then, FeO combines with silica to form silicate, FeSiO3 (slag).
FeO + SiO2→ FeSiO3 (slag)
New answer posted
4 months agoContributor-Level 10
The steps involved in the extraction of zinc from zinc blende (ZnS) are as followed:-
- Concentration: the ore is crushed and then concentrated by froth floatation
- Roasting: the concentrated ore is heated in the presence of an excess of air at about 1200K to form zinc
- ZnS + 3 O2 → 2 ZnO + 2 SO2
- Reduction: ZnO obtained above is mixed with powdered coke and heated to 1673K in a fireclay
- ZnO + C → Zn + CO
- Electrolytic Refining: Zinc is refined by the process of electrolytic refining. In this process, impure zinc is made the anode and a pure copper strip is made the cathode. The electrode used in an acidified solution of zinc sulphate (ZnSO4).
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else
Sign Up on ShikshaOn Shiksha, get access to
- 65k Colleges
- 1.2k Exams
- 687k Reviews
- 1800k Answers