why the pH scale range is 0-14?
What materials are needed in making glass ?
What is meant by transmittance?
Which is the hardest substances know ?
if this element X combines with another element Y whose electronic configuration is 2, 8, 7 what will be the formula of the compound thus formed? State how did you arrive at this formula
Why is Davy Lamp called a Safety Lamp ?
At what temperature does mercury freeze ?
What is the limitation of cod?
A dynamite catridge struck in a rock makes the rock burst in being fired. How dies it happen ?
Explain about Paints and Pigments ?
Define what is oxidation and reduction reaction?
Why do you require laboratory temperature for viscosity determination?
What is german silver?