Prepare a list of objects around you that are electroplated.
- Chromium plating is done on many objects such as car parts, bath taps, kitchen gas burners and many others.
- Jewellary makers electroplate silver and gold on expensive metals.
- Tin cans used for storing food that are made by electroplating tin onto iron.
- Iron is used in bridges automobiles to provide strength. That’s why a coating of zinc is deposited on iron to protect it from corrosion and from the formation of rust.
Popular Questions of Class 8 Science
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Describe with the help of a diagram an instrument which can be used to detect a charged body.
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Sketch larynx and explain its function in your own words.
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Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.
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Make a labelled diagram of a candle flame.
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What is metamorphosis? Give examples.
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The following Table shows the total power shortage in India from 1991– 1997. Show the data in the form of a graph. Plot shortage percentage for the years on the Y-axis and the year on the X-axis.
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Make sketches of animal and plant cells. State three differences between them.
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What is a constellation? Name any two constellations.
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Describe the construction of a kaleidoscope.
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Complete the crossword with the help of clues given below:
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Recently Viewed Questions of Class 8 Science
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In order to meet the ever-increasing demand in factories and for shelter, trees are being continually cut. Is it justified to cut trees for such projects? Discuss and prepare a brief report.
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Which zone of a flame does a goldsmith use for melting gold and silver and why?
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In an experiment 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel.
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In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.
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Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.
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Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?
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Describe the process of fertilization in human beings.
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Give examples to show that friction is both a friend and a foe.
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Which of the following is NOT a planet of the sun?
(a) Sirius
(b) Mercury
(c) Saturn
(d) Earth - Q:-
Paheli had heard that rainwater is as good as distilled water. So she collected some rainwater in a clean glass tumbler and tested it using a tester. To her surprise she found that the compass needle showed deflection. What could be the reasons?
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