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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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10480
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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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467
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October 20, 2016
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How are metals extracted from mineral ores?
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0
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470
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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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515
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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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8281
|
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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4260
|
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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3628
|
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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3207
|
October 20, 2016
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How do you know the reactivity of the metals with chlorine decreases from top to bottom?
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0
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472
|
October 20, 2016
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Why do we aid impurities to electrolyte during electrolytic extraction of metals?
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0
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1359
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October 20, 2016
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What is meant by flux?
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0
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1640
|
October 20, 2016
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Mention the stages involved in extraction of a metal from its ore
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0
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811
|
October 20, 2016
|
|
Why do we call oxygen-sulphur group chalcogen family?
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0
|
881
|
October 20, 2016
|
|
What is activity series?
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0
|
591
|
October 20, 2016
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Why alloying is preferred for metals ? Explain with examples
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0
|
686
|
October 20, 2016
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What is a furnace ? Explain various parts of furnace
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0
|
991
|
October 20, 2016
|
|
How do you know the reactivity of metals with chlorine decreases from top to bottom?
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|
0
|
498
|
October 20, 2016
|
|
How do various metals in activity series react with chlorine on heating?
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0
|
757
|
October 20, 2016
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Explain the reaction of various metals in activity with cold water
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0
|
460
|
October 20, 2016
|
|
What is 22 carat gold ? Why it is preferred for making jewellery?
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|
0
|
2216
|
October 20, 2016
|
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Give some examples for corrosion
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0
|
1706
|
October 20, 2016
|
|
What are the preventive techniques used in corrosion of metals?
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|
0
|
996
|
October 20, 2016
|
|
How do you reduce purified ore to the metal of the top of activity series ? Explain
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|
0
|
1112
|
October 20, 2016
|
|
How do various metals in activity series react with dilute strong acids?
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|
0
|
663
|
October 20, 2016
|
|
How do various metals in activity series react with steam?
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|
0
|
704
|
October 20, 2016
|
|
Do all furnaces have same structure ? Explain
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|
0
|
1658
|
October 20, 2016
|
|
Write the reactions inside a blast furnance
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0
|
1090
|
October 20, 2016
|
|
What is the role of washing in enriching the ore?
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0
|
625
|
October 20, 2016
|
|
Explain the process of hand picking
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|
0
|
791
|
October 20, 2016
|
|
Give an example of auto reduction of sulphide ores
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0
|
2495
|
October 20, 2016
|