Calculate the volume, mass and number of molecules of hydrogen
|
|
1
|
10816
|
October 19, 2016
|
Uppose that you are asked to calculate the amount of aluminium,
|
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1
|
1072
|
October 19, 2016
|
How do we know that a chemical reaction has taken place?
|
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0
|
4014
|
October 19, 2016
|
What change we observe by mixing of sodium sulphate and barium chloride?
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0
|
1851
|
October 19, 2016
|
Write an activity when calcium oxide reacts with water
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0
|
1302
|
October 19, 2016
|
Why do we apply paint on iron articles?
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|
0
|
976
|
October 19, 2016
|
Freshly cut apple turning brown
|
|
1
|
736
|
October 19, 2016
|
Why the white washing gives shiny finish to the walls?
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|
0
|
10100
|
October 19, 2016
|
What is oxidation-reduction reaction or redox reaction ? Give one example
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|
0
|
596
|
October 19, 2016
|
What is an alloy?
|
|
0
|
3658
|
October 19, 2016
|
What is chemical change?
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|
0
|
499
|
October 19, 2016
|
What is a balanced chemical equation?
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|
0
|
478
|
October 19, 2016
|
What is the use of keeping food in air tight containers?
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|
0
|
5243
|
October 19, 2016
|
Explain rancidity
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0
|
961
|
October 19, 2016
|
What do you mean by corrosion ? How can you prevent it?
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0
|
3484
|
October 19, 2016
|
In the refining of silver
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1
|
1029
|
October 19, 2016
|
Give two examples for oxidation - reduction reaction
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|
0
|
4157
|
October 19, 2016
|
Name the reactions taking place in the presence of sunlight
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0
|
6392
|
October 19, 2016
|
What do you mean by precipitation reaction?
|
|
0
|
834
|
October 18, 2016
|
Write the balanced chemical equations for the following reactions
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|
1
|
4603
|
October 18, 2016
|
What symbols do we use to indicate the physical state of reactants and products in an equation?
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|
0
|
1669
|
October 18, 2016
|
Write some chemical reactions occurring in our daily life
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0
|
563
|
October 18, 2016
|
What are the important characteristics of chemical reactions?
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|
0
|
3604
|
October 18, 2016
|
What are the effects of oxidation on everyday life?
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|
0
|
2795
|
October 18, 2016
|
How do you write a chemical equation?
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|
0
|
5229
|
October 18, 2016
|
What do you observe during chemical change?
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|
0
|
563
|
October 18, 2016
|
What do you mean by "rancidity"?
|
|
0
|
2766
|
October 18, 2016
|
What is corrosion?
|
|
0
|
10286
|
October 18, 2016
|
What is a reduction ? Give examples
|
|
0
|
2969
|
October 18, 2016
|
What is oxidation ? Give examples
|
|
0
|
6567
|
October 18, 2016
|