What are filters? Why are they used?
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What is the role of mercuric sulphate?
What is Displacement Reaction .
Why do eye-glasses become fogged, when the wearer comes form the cold outdoors into a warm room ?
What is the difference between gas and vapour?
A dynamite catridge struck in a rock makes the rock burst in being fired. How dies it happen ?
What are the soldiers in an army, while crossing a bridge ordered to go out of step?
Which gas used for purifying, air in underground enterprises ?
What is Atomic number?
Why is starch indicator added towards the end point?
Why is a halo formed round the moon, when the sky is clear ?
Why is radiator used in a motor-ear ?
How BIS Decedied the LSF value 0.66-1.02 with calculation.