|
Write 10 lines on the usefulness of microorganisms in our lives
|
|
1
|
54074
|
July 2, 2018
|
|
Describe ‘Greenhouse Effect’ in your own words
|
|
0
|
11154
|
March 22, 2018
|
|
Explain the traditional way of purifying water to make it fit for drinking
|
|
0
|
2894
|
March 21, 2018
|
|
What was the condition of colonial economy in Vietnam? Explain
|
|
0
|
2397
|
March 3, 2018
|
|
What is the basic principle of electric pen ? Explain how it can be used for writing
|
|
0
|
4621
|
September 16, 2017
|
|
What is the difference between current flowing through metals and current flowing
|
|
0
|
3158
|
September 16, 2017
|
|
Give some uses of LED. How should LED be connected?
|
|
0
|
2955
|
September 16, 2017
|
|
Give methods by which pollution due to plastics can be solved
|
|
0
|
2095
|
September 16, 2017
|
|
Dinesh is wants to study the chemical effect of current at home. How can he do it?
|
|
0
|
1759
|
September 16, 2017
|
|
Even though plastics are very useful, they are not environment friendly.” Justify the statement
|
|
0
|
4355
|
September 16, 2017
|
|
How is plastic useful in healthcare industry?
|
|
0
|
4145
|
September 16, 2017
|
|
Which properties of chromium make it useful for electroplating on iron?
|
|
0
|
2697
|
September 16, 2017
|
|
‘Avoid plastics as far as possible’. Comment on this advice
|
|
0
|
14379
|
September 16, 2017
|
|
Iron is a strong metal used for making bridges. Can we do electroplating
|
|
0
|
2356
|
September 16, 2017
|
|
What precautions should be observed when doing electroplating?
|
|
0
|
3342
|
September 16, 2017
|
|
Manufacturing synthetic fibres is actually helping conservation of forests’. Comment
|
|
0
|
1239
|
September 16, 2017
|
|
What is the objective of electroplating?
|
|
0
|
3531
|
September 16, 2017
|
|
Give three applications of chemical effect of current
|
|
0
|
8389
|
September 16, 2017
|
|
During electrolysis of water, why does hydrogen collect on cathode
|
|
0
|
3328
|
September 16, 2017
|
|
Explain the process of electroplating of copper
|
|
0
|
8874
|
September 16, 2017
|
|
Match the terms of Column A correctly with the phrases given in Column B
|
|
0
|
1223
|
September 16, 2017
|
|
How can the magnetic effect be used as a tester?
|
|
0
|
2232
|
September 16, 2017
|
|
If the current in the circuit is small, how can we test its presence?
|
|
0
|
1243
|
September 16, 2017
|
|
Categorise the materials of the following products into ‘can be recycled’ and ‘cannot be recycled’
|
|
0
|
3974
|
September 16, 2017
|
|
The liquid is a conductor and the circuit is also complete, but the bulb does not glow
|
|
0
|
1775
|
September 16, 2017
|
|
The bulb in the tester does not glow when current is passed through
|
|
0
|
1354
|
September 16, 2017
|
|
Give the characteristics of synthetic fibres
|
|
0
|
1050
|
September 16, 2017
|
|
What are the disadvantages of wearing synthetic fabrics?
|
|
0
|
1907
|
September 16, 2017
|
|
How can you make a tester for testing whether a given material
|
|
0
|
1442
|
September 16, 2017
|
|
Why people prefer to wear acrylic sweaters than pure wool sweaters?
|
|
0
|
1366
|
September 16, 2017
|