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The power of the magnifying glass depends on the distance of the magnifying glass from object.
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Electrolysis is used to obtain pure metal from impure metal.
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Write scientific reason.
Farsightedness, this defect can be corrected by using convex lens.
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Explain the factors affecting the rate of chemical reaction with example.
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Explain the following reaction with the balanced equation.
Aluminium reacts with dil hydrochloric acid
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Explain the following reaction with the balanced equation.
Reaction of zinc with dil hydrochloric acid
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Write a short note on the galvanometer.
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Find the power of a convex lens of focal length of + 25 cm.
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If focal length of a convex lens is 20 cm at what is the power of the lens?
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The power of convex lens of focal length 20 cm is ______.
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Identify the figure and give its use.
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Suggest measures in bursting fire crackers in festivals and processions.
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Explain the role of citizen in pollution control.
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What is corrosion?
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Compare roasting and calcination.
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Compare roasting and calcination.
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Observe the following picture a write down the chemical reaction with the explanation.
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Observe the following picture a write down the chemical reaction with the explanation.
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Write a scientific reason.
Elements belonging to the same group have the same valency.
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