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CBSE - XII Science - Chemistry - Isolation of Elements
Extraction of iron from haematite ore
Asked by utsavs858
5th March 2021,
12:36 AM
CBSE - XII Science - Chemistry - Isolation of Elements
which metal is found in core of earth
Asked by akhilspillai2005
8th November 2020,
3:17 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
28th February 2020,
11:39 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
28th February 2020,
11:38 AM
CBSE - XII Science - Chemistry - Isolation of Elements
pl answer
Asked by jain.pradeep
28th February 2020,
11:38 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
28th February 2020,
11:37 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
27th February 2020,
2:48 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
27th February 2020,
2:48 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
26th February 2020,
9:59 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Which of the following metal can be obtained by the electrolysis of the aqueous solution of their salts. a) Cu. b) Na c) Mg d) K
Asked by sayleeashelar
22nd May 2019,
11:32 AM
CBSE - XII Science - Chemistry - Isolation of Elements
What are the chemical names & chemical formula of the following ores: Bauxite,Galena,Cinnabar,Magnetite,Haematite
Asked by agraharianiruddha
20th September 2018,
6:56 PM
CBSE - XII Science - Chemistry - Isolation of Elements
the graphite electrode in extraction of Al by Hall Heroults process need to be changed freuently why
Asked by niharikapabba2605
7th August 2018,
11:33 AM
CBSE - XII Science - Chemistry - Isolation of Elements
name 3 metals that occur in native state
Asked by niharikapabba2605
7th August 2018,
11:31 AM
CBSE - XII Science - Chemistry - Isolation of Elements
what do you mean by flux ? what are different kinds of flux with examples
Asked by niharikapabba2605
7th August 2018,
11:21 AM
CBSE - XII Science - Chemistry - Isolation of Elements
describe the role of 
in metallurgy of Fe
in metallurgy of Fe
Asked by niharikapabba2605
7th August 2018,
11:19 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Why is copper always found in a combined state despite occupying a lower position in the reactivity series?
Asked by lekhakarthikeyan
6th July 2018,
7:44 PM
CBSE - XII Science - Chemistry - Isolation of Elements
EXPLAIN THE EXTRACTION OF COPPER FROM COPPER OXIDE WITH CHEMICAL REACTION??
Asked by SATYAM
12th June 2017,
7:04 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What is the difference between calcinations and roasting?
Asked by Topperlearning User
22nd June 2016,
2:58 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Name the process by which Haematite and Magnetite ores can be concentrated. Also draw a well labeled diagram of this process.
Asked by Topperlearning User
22nd June 2016,
2:48 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What is the significance of leaching in the extraction of aluminium?
Asked by Topperlearning User
22nd June 2016,
2:44 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Name the chief ore of silver. Describe with chemical equations the extraction of silver from this ore.
Asked by Topperlearning User
22nd June 2016,
2:42 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Describe the principle behind each of the following processes: (i) Vapour phase refining of a metal. (ii) Electrolytic refining of a metal. (iii) Recovery of silver after silver ore was leached with NaCN.
Asked by Topperlearning User
22nd June 2016,
2:41 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Which is the most abundant element in the earth's crust?
Asked by 2330anurag
28th June 2015,
7:01 PM
CBSE - XII Science - Chemistry - Isolation of Elements
can u provide some tips on how to study?
i am facing problem in memorizing the reactions and remembering the formulas
plz?
Asked by Nikhil
2nd August 2014,
7:34 PM
CBSE - XII Science - Chemistry - Isolation of Elements
(a)Which solution is used for the leaching of silver metal in the presence of air in the metallurgy of silver? (b)Out of C and CO, which is a better reducing agent at the lower temperature range in the blast furnace to extract iron from the oxide ore?
Asked by Topperlearning User
30th June 2014,
1:31 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What type of metals exists in native state in nature?
Asked by Topperlearning User
30th June 2014,
12:07 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Describe the underlying principle of each of the following metal refining methods: i. Electrolytic refining of metals ii. Vapour phase refining of metals
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What is meant by the term 'pyrometallurgy'?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
State briefly the principles which serve as basis for the following operations in metallurgy: (i) Froth floatation process (ii) Zone refining (iii) Refining by liquation
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Name the method used for the refining of Nickel metal.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Draw a well labeled diagram of reverberatory furnace.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What is the role of each of the following in froth floatation process (i) Collectors (ii) Froth stabilizers (iii) Depressants
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Name the various steps involved in metallurgy.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What is the formula of Iron pyrite and Copper pyrite?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Predict the reactivity of metals that occur in nature in the form of their chlorides, sulphates or carbonates.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
In which state do moderately reactive metals such as iron occur in nature?
Asked by Topperlearning User
4th June 2014,
1:23 PM
