How is hardness of water caused?
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What is density of a liquid?
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Why is sulphuric acid added during the preparation of standard fas solution?
What is the monomer of polyethene?
What is OOS $ OOT ?
What is the composition of brass ?
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What is the composition of ferroin?
4.0 liters of oxygen are mixed with 8.0 liters of nitrogen. Identify the solute and solvent in this mixture:
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Why do we hear thunder after seeing a flash of lightning ?