What is the use of Dynamo?
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What is the element required for solar energy conversion?
Which animal uses sounds as its ?eyes??
Recently, over 140 countries have agreed on the first international treaty called MINAMATA Convention. It aims to reduce the emission and release of which element into air, water and land? (a) Lead (b) Sulphur (c) Mercury (d) Cadmium
How Potassium permanganate is use for purifying drinking water?
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Why does a big fire in the open appear to be fanned by strong winds?
which chemical is used to ripe the fruits?
Which the base of quartz crystal working in the watch?
How an ant can see the objects all round?
Why the sky appears blue?
How the Oil rises up the wick in a lamp?
Which variety of glass is heat resistant?