Differentiate between modern periodic table and mendeleevs table?
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why do hard water never produce foam when a soap is dissolved?
Why do you require laboratory temperature for viscosity determination?
Which expands to the greatest, when heated : silids, liquids or gases ?
What is the composition of bronze ?
What is the limitation of cod?
What are the names of the three different rays emitted by radioactive substances ?
What is a cell?
Why is the bottom of a kettle blackened and top polished?
which acid present in soda water?
On the cold morning, a gardener touches the iron blade of his spade with one hand and its wooden handle with other hand. Why does he feel the iron blade to be colder than the wooden handle ?
What is the safety curtain in cinema or theatre made off ?
Why does a match-stick burn, when struck against the match-box surface