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CBSE - XII Science - Chemistry - Isolation of Elements
in elingham diagram why metals at the lower of diagram can reduce metal oxides at top in diagram?
Asked by yashrajgharte24.12dgatl
14th October 2021,
10:13 PM
CBSE - XII Science - Chemistry - Isolation of Elements
which method is used for refining of nickel
Asked by bindersaran3
4th June 2020,
9:18 AM
CBSE - XII Science - Chemistry - Isolation of Elements
magnetic separation
Asked by tribikramdash16
16th May 2020,
6:51 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Please answer
Asked by jain.pradeep
28th February 2020,
11:39 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
27th February 2020,
2:49 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Please Answer
Asked by jain.pradeep
27th February 2020,
2:49 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Pl answer
Asked by jain.pradeep
26th February 2020,
9:58 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Froth floatation process for the concentration of ore is an illustration of the partical application of
Asked by sree1791983
23rd February 2020,
8:38 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Can you please explain brask furnance part of metallurgy
Asked by taruarora2605
26th January 2020,
11:58 AM
CBSE - XII Science - Chemistry - Isolation of Elements
During concentration of sulphide ores by froth floatation process potassium ethyl xanthate is added why?
Asked by Vidushi412
2nd March 2019,
2:48 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Extraction of iron
Asked by tabishsagardina
7th January 2019,
11:06 PM
CBSE - XII Science - Chemistry - Isolation of Elements
what are the limitations of Ellingham diagram?
Asked by pksbbk98
7th August 2018,
7:18 PM
CBSE - XII Science - Chemistry - Isolation of Elements
name the reducing agent used in thermite process
Asked by niharikapabba2605
7th August 2018,
11:34 AM
CBSE - XII Science - Chemistry - Isolation of Elements
what happens when haematite oxides carbon to carbonmonoxide
Asked by niharikapabba2605
7th August 2018,
11:29 AM
CBSE - XII Science - Chemistry - Isolation of Elements
what happens when Cu2o undergoes self reduction in silica line converter
Asked by niharikapabba2605
7th August 2018,
11:25 AM
CBSE - XII Science - Chemistry - Isolation of Elements
what do you mean by ellingams diagram ? explain its importance
Asked by niharikapabba2605
7th August 2018,
11:23 AM
CBSE - XII Science - Chemistry - Isolation of Elements
describe the method used for refining of Germenium
Asked by niharikapabba2605
7th August 2018,
11:20 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Why is copper extracted by electrolysis?
Asked by lekhakarthikeyan
6th July 2018,
8:44 PM
CBSE - XII Science - Chemistry - Isolation of Elements
When is each of the following refining processes used? 1. zone refining 2. electrolytic refining 3. vapor phase refining
Asked by lekhakarthikeyan
4th July 2018,
2:21 AM
CBSE - XII Science - Chemistry - Isolation of Elements
In Carius method, for the estimation of halogen, 0.15g of an organic compound gave 0.12g of AgBr. The percentage of bromine in the compound is (a) 34.04% (b) 66.04% (c) 44.04% (d) 54.04%
Asked by sunil2791
25th April 2018,
6:50 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Why is that only sulphide ores are concentrated by froth floatation?
Asked by banga71
13th January 2018,
11:37 AM
CBSE - XII Science - Chemistry - Isolation of Elements
What is meant by chromatographic method of refining?
Asked by Topperlearning User
22nd June 2016,
3:02 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 ore was leached with NaCN.
Asked by Topperlearning User
22nd June 2016,
2:56 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Describe how the following changes are brought about: (i) Pig iron into steel. (ii) Zinc oxide into metallic zinc. (iii) Impure titanium into pure titanium. OR Describe the role of (i) NaCN in the extraction of gold from gold ore. (ii) SiO2 in the extraction of copper from copper matte. (iii) Iodine in the refining of zirconium. Write chemical equations for the involved reactions.
Asked by Topperlearning User
22nd June 2016,
2:56 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Describe Hall-Heroult process used for the electrolysis of pure alumina?
Asked by Topperlearning User
22nd June 2016,
2:56 PM
CBSE - XII Science - Chemistry - Isolation of Elements
which is a better reducing agent for the conversion of Fe2O3 into the meatl above 1000K. How to prepare one markers from this chapter.
Asked by ShruthiGiridharan
24th March 2016,
6:59 PM
CBSE - XII Science - Chemistry - Isolation of Elements
explain the process of extraction of iron copper and aluminium presented in a board answer manner
Asked by rohit dalal
18th February 2015,
1:08 PM
CBSE - XII Science - Chemistry - Isolation of Elements
explain ellingham diagram
elpain the way to write the complete process of extraction of iron, copper and aluminium in board exam
explain method of chromatography
Asked by rohit dalal
18th February 2015,
12:54 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Explain the working of Blast Furnace.
Asked by alonewalker97
27th December 2014,
2:12 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Describe the principle involved in each of the following processes. (i) Mond's process for refining of Nickel. (ii) Column chromatography for purification of rare elements.
Asked by Topperlearning User
27th June 2014,
4:30 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Give uses of aluminium.
Asked by Topperlearning User
27th June 2014,
2:32 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Explain an extraction of a non-metal.
Asked by Topperlearning User
27th June 2014,
1:01 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Give uses of cast iron.
Asked by Topperlearning User
27th June 2014,
10:23 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Give uses of zinc.
Asked by Topperlearning User
27th June 2014,
10:16 AM
CBSE - XII Science - Chemistry - Isolation of Elements
Give uses of copper.
Asked by Topperlearning User
27th June 2014,
10:11 AM
CBSE - XII Science - Chemistry - Isolation of Elements
What do you understand by the terms quenching and tempering. Also name the metal with which these terms are associated?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Give some important uses of silver.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Define chromatography.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What are the conditions that are necessary for vapour phase refining?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Explain the process used for refining Zirconium or Titanium?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Which metal is used in the extraction of chromium and manganese from their oxides?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Name the purest form of iron.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
How is Zinc dust prepared from zinc metal?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
Name the method which is used for the purification of germanium, silicon and gallium used in semiconductors?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Chemistry - Isolation of Elements
What is the role of graphite in the electrometallurgy of aluminium?
Asked by Topperlearning User
16th May 2014,
3:07 PM
CBSE - XII Science - Chemistry - Isolation of Elements
metullargy
Asked by
23rd February 2008,
10:30 AM
