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Write 10 lines on the usefulness of microorganisms in our lives
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1
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53900
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July 2, 2018
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Describe ‘Greenhouse Effect’ in your own words
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0
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11103
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March 22, 2018
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Explain the traditional way of purifying water to make it fit for drinking
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0
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2819
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March 21, 2018
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What was the condition of colonial economy in Vietnam? Explain
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0
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2344
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March 3, 2018
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What is the basic principle of electric pen ? Explain how it can be used for writing
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0
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4475
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September 16, 2017
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What is the difference between current flowing through metals and current flowing
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0
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3051
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September 16, 2017
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Give some uses of LED. How should LED be connected?
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0
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2867
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September 16, 2017
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Give methods by which pollution due to plastics can be solved
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0
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2052
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September 16, 2017
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Dinesh is wants to study the chemical effect of current at home. How can he do it?
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0
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1698
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September 16, 2017
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Even though plastics are very useful, they are not environment friendly.” Justify the statement
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0
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4269
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September 16, 2017
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How is plastic useful in healthcare industry?
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0
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4098
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September 16, 2017
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Which properties of chromium make it useful for electroplating on iron?
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0
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2618
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September 16, 2017
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‘Avoid plastics as far as possible’. Comment on this advice
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0
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14319
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September 16, 2017
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Iron is a strong metal used for making bridges. Can we do electroplating
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0
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2279
|
September 16, 2017
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What precautions should be observed when doing electroplating?
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0
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3271
|
September 16, 2017
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Manufacturing synthetic fibres is actually helping conservation of forests’. Comment
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0
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1185
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September 16, 2017
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What is the objective of electroplating?
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0
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3448
|
September 16, 2017
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Give three applications of chemical effect of current
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0
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8340
|
September 16, 2017
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During electrolysis of water, why does hydrogen collect on cathode
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0
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3246
|
September 16, 2017
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Explain the process of electroplating of copper
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0
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8253
|
September 16, 2017
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Match the terms of Column A correctly with the phrases given in Column B
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0
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1159
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September 16, 2017
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How can the magnetic effect be used as a tester?
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0
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2170
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September 16, 2017
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If the current in the circuit is small, how can we test its presence?
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0
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1187
|
September 16, 2017
|
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Categorise the materials of the following products into ‘can be recycled’ and ‘cannot be recycled’
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0
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3920
|
September 16, 2017
|
|
The liquid is a conductor and the circuit is also complete, but the bulb does not glow
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0
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1730
|
September 16, 2017
|
|
The bulb in the tester does not glow when current is passed through
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0
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1292
|
September 16, 2017
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|
Give the characteristics of synthetic fibres
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0
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1006
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September 16, 2017
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What are the disadvantages of wearing synthetic fabrics?
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0
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1853
|
September 16, 2017
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How can you make a tester for testing whether a given material
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0
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1380
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September 16, 2017
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Why people prefer to wear acrylic sweaters than pure wool sweaters?
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0
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1303
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September 16, 2017
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