What is a cell?
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When carbon is made to burn in an atmosphere of oxygen, what is produced ?
What is the bluish white precipitate formed after adding ammonia solution?
If you are given two liquids, which look like water, how can you, by two physical tests, prove which one of them may be water ?
Why do we feel chilly in damp clothes ?
Why is dew formed more readily on clear nights than on cloudy ones ?
what is the valence of nitrogen?
Why ph scale range is 14? Why it is not less or not greater than 14?
If the stopper if a bottle has stuck, sometimes it may be removed by heating the neck, why ?
Why is ammonia added? Why is that same amount of ammonia added?
How is the measurement of ph made?
What is density of a liquid?
Give the principle of potentiometer titration.