How is arsenic produced?
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What is the difference between iron and steel ?
why in atomic mass electron is not include while proton and neutron include? although electron is a part of atom.
Though the secondary cell can be recharged again and again, still they have a lifetime. Why?
In winter, on a cold morning, the cement feels colder to the foot than a carpet. Why ?
What is the chemical formula of alum?
What is the composition of bronze ?
Why is alum added to purify water ?
Explain about Graham?s law of Diffusion ?
Which expands to the greatest, when heated : silids, liquids or gases ?
What test will you use to distinguish cotton from wool ?
Explain the Compound?
Why does the water in tanks and ponds not freeze in winter ?