Please select a subject first
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A mixture of milk and groundnut oil can be separated by :
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The chemical which can be used to separate a mixture of carbon powder and sulphur powder successfully is :
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Explain natural and human-made sources of air pollution.
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Briefly explain main layers of the atmosphere.
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What are the effects of air pollution on human beings?
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Describe the major components of air pollution.
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The commercial unit of energy is :
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Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
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Describe the causes and effects of air pollution.
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Name one solid, on liquid and one gas through which sound can travel.
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Is the speed of sound more in water or in steel?
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In which medium sound travels faster : air or iron?
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In which medium sound travels fastest : air, water or steel?
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Out of solids, liquids and gases :
(a) in which medium sound travels slowest?
(b) in which medium sound travels fastest?
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State one observation from everyday life which shows that sound travels much more slow than light.
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Write the full form of IUPAC.
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In which medium sound travels faster : air or hydrogen?
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Why is air called breath of life? Enumerate functions of air or atmosphere.
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Name the scientist who gave law of conservation of mass.
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