What is the chief commercial use of Phosphorus ?
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Why ate the electric fuses used in an electric current ?
Why is it more efficient for a labourer to raise bricks up to a brick layer by the use of a rope and pully than by carrying them up a ladder ?
What is Acidity of a base ?
What is mortar /
What is the white precipitate produced at the end of point?
Acid value defination is numbber milligrams of KOH required to nuetralise the acid present in one gram oil & fats but why not use NaOH for nuetralisation?
Why does a pencil look cracked, when partly immersed in water ?
Why ate shadows longer at the end of the day ?
Which is the indicator used in the determination of cao I cement solution?
What is edta?
Explain the Solution ?
Define Vulcanization?