Explain the process of spontaneous combustion?
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When the heat rays from the sun area focused on a piece of black cloth by means of a lens, the cloth catches fire. Why ?
Why does the filament of an electric lamp glow, when current passes through it ?
Arrange by acidic values : phenol, nitrotolouene and o-cresol?
Define Vulcanization?
What is meant by amalgam ?
Why are the bright circles of light seem under the trees, when the sun shines?
What is Nutralication ?
If the stopper if a bottle has stuck, sometimes it may be removed by heating the neck, why ?
What is dextro-rotatory and levo-rotatory?
Which is the hottest part of a flame ?
i pass my B.Sc. in 1999(chemistry. i dont understand what study after bsc. i am an average student.After my Bsc i joint my brother factory and i work there as a production, QC and electrical testing for Oil. i try to another job but my exprince not match my education co u tale me what i do.
What is Daltons Atomic Theory ?