Why is ammonia-ammonium chloride buffer added?
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Why are wires used to carry electricity ?
What is meant by transmittance?
Explain the Chemical change?
Why is Davy Lamp called a Safety Lamp ?
What is the composition of stainless steel ?
Why do we hear thunder after seeing a flash of lightning ?
Why dies thermos flask keep a hot liquid hot and a cold liquid cold ?
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Why does a freely supended magnetic needle always point North and South ?
What is Bases ?
What is photoelectric colorimeter?
why in atomic mass electron is not include while proton and neutron include? although electron is a part of atom.
Explain the following ? Matter, Element, Atom, Compound, Molecule, Mixture, Physical change, Chemical change