How are the waters classified based on the degree of hardness?
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We see the sun before it rises above the horizon in the morning. Why?
What are constituents of brass?
The heat of the sun reaches us and the intervening air is not heated up Why ?
What is molality?
Explain about Chemical Equilibrium ?
Why has every parachute a hole in the centre ?
Distinguish between flannel and flannelette ?
What is the effect of the flashes of lightning during a thunderstorm ?
Write the structural formula for edta.
Explain the following ? Matter, Element, Atom, Compound, Molecule, Mixture, Physical change, Chemical change
Why is the indicator eriochrome black(ebt) shows wine red color at the beginning and blue color at the end?
What is Evaporation ?