Why does the water in tanks and ponds not freeze in winter ?
What is Salts ?
why in atomic mass electron is not include while proton and neutron include? although electron is a part of atom.
Define Atom ?
Why do eye-glasses become fogged, when the wearer comes form the cold outdoors into a warm room ?
How is wood charcoal manufactured ?
Why does a white paper appear white, when light is not to fall on it ?
Why is a newly made quit warmer than an old one ?
Why do you require laboratory temperature for viscosity determination?
What is weak acid?
Which element is nether a solid nor a liquid?
What is meant by amalgam ?
what is the formula of diesel,petrol & CNG too?