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Write structure and molecular formula for the following compounds : (a) orthophosphoric acid (b) sulphurous acid

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Write structure and molecular formula for the following compounds :
(a) orthophosphoric acid
(b) sulphurous acid
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(a) Molecular formula `=H_(3)PO_(4)` orthophosphoric acid
image
(b) Molecular formula of sulphurous acid `=H_(2)SO_(3)`
Structure = `HO-underset(..)overset(O)overset(||)(S)-OH`
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