Which gas is used, in laboratories etc. for burners ?
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Can a molecule be divided ?
Why is heat more oppressive on a damp hot day ?
which metal is found abundantly in the earths crust??
If the stopper if a bottle has stuck, sometimes it may be removed by heating the neck, why ?
What important property of water makes it possible for plants to grow under it and for animals to live it ?
Mention the different types of conductivities.
Why Nitric acid can be stored in Aluminium containers?
What s the difference between hard and soft coal ?
What are hard waters?
What is the safety curtain in cinema or theatre made off ?
why bottles of Hazardous chemicals or solvent are available in round shaped only?
From what was Uranium isolated ?