Mention the formula to calculate ph of a solution?
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Explain the process of spontaneous combustion?
If the stopper if a bottle has stuck, sometimes it may be removed by heating the neck, why ?
Why ate the electric fuses used in an electric current ?
Do all explosions produce carbon dioxide or carbon monoxide?
Why is air removed from the electric lamps ?
Explain the Atom?
Which gas is used in bulbus ?
Explain the Purification of Organic Compounds ?
Why is disodium salt of edta preferred to edta?
What are the constituents of cements?
Why it is advised to boil water before drinking ?
How is water purified on large scale, for drinking ?