Chemical formula for sulphurous acid is:
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Which gas is released when water is added to bleaching powder?
__________gives hardness to stainless steel.
Chromite is an ore/mineral of
........... is not a sub atomic particle of an atom.
The oceanic crust mainly consists of silica and __________.
If an atom has atomic number 10 and mass number 23, then what will be the number of protons and neutrons in an atom respectively?
The strongest interactions between molecules of hydrogen chloride are
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