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Collect information about extraction of metals of low reactivity silver, platinum and gold and prepare a report
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1
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10891
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December 20, 2017
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Does the reactivity of a metal
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1
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570
|
October 20, 2016
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|
How are metals extracted from mineral ores?
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0
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573
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October 20, 2016
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How the metals present in nature?
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0
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624
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October 20, 2016
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Do you agree with the statement "All ores are minerals but all minerals need not be ores". Why?
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0
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8537
|
October 20, 2016
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Show that both air and water are necessary for corrosion of iron
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0
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5115
|
October 20, 2016
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Classify the following ores into oxides, sulphides, chlorides, carbonates, sulphates
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0
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5612
|
October 20, 2016
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|
An ore gives carbondioxide on treatment with dilute acid
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|
1
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3316
|
October 20, 2016
|
|
How do you know the reactivity of the metals with chlorine decreases from top to bottom?
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|
0
|
660
|
October 20, 2016
|
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Why do we aid impurities to electrolyte during electrolytic extraction of metals?
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0
|
1682
|
October 20, 2016
|
|
What is meant by flux?
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0
|
1981
|
October 20, 2016
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Mention the stages involved in extraction of a metal from its ore
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0
|
888
|
October 20, 2016
|
|
Why do we call oxygen-sulphur group chalcogen family?
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|
0
|
1021
|
October 20, 2016
|
|
What is activity series?
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0
|
697
|
October 20, 2016
|
|
Why alloying is preferred for metals ? Explain with examples
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|
0
|
808
|
October 20, 2016
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What is a furnace ? Explain various parts of furnace
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0
|
1211
|
October 20, 2016
|
|
How do you know the reactivity of metals with chlorine decreases from top to bottom?
|
|
0
|
621
|
October 20, 2016
|
|
How do various metals in activity series react with chlorine on heating?
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|
0
|
872
|
October 20, 2016
|
|
Explain the reaction of various metals in activity with cold water
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|
0
|
570
|
October 20, 2016
|
|
What is 22 carat gold ? Why it is preferred for making jewellery?
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|
0
|
2394
|
October 20, 2016
|
|
Give some examples for corrosion
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0
|
1828
|
October 20, 2016
|
|
What are the preventive techniques used in corrosion of metals?
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0
|
1114
|
October 20, 2016
|
|
How do you reduce purified ore to the metal of the top of activity series ? Explain
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|
0
|
1271
|
October 20, 2016
|
|
How do various metals in activity series react with dilute strong acids?
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|
0
|
769
|
October 20, 2016
|
|
How do various metals in activity series react with steam?
|
|
0
|
900
|
October 20, 2016
|
|
Do all furnaces have same structure ? Explain
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|
0
|
2007
|
October 20, 2016
|
|
Write the reactions inside a blast furnance
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0
|
1450
|
October 20, 2016
|
|
What is the role of washing in enriching the ore?
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|
0
|
746
|
October 20, 2016
|
|
Explain the process of hand picking
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|
0
|
903
|
October 20, 2016
|
|
Give an example of auto reduction of sulphide ores
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0
|
2645
|
October 20, 2016
|