JEE CHEMISTRY MCQ: HYDROGEN

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Calgon used as water softner is

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Correct option: A

\mathrm{N}{\mathrm{a}_2}\left[ {\mathrm{N}{\mathrm{a}_4}{{\left( {\mathrm{P}{\mathrm{O}_3}} \right)}_6}} \right]

Option A (

\mathrm{N}{\mathrm{a}_2}[ {\mathrm{N}{\mathrm{a}_4}{{\left( {\mathrm{P}{\mathrm{O}_3}} \right)}_6}} ]

) is correct because it represents the chemical formula of Calgon, which is sodium hexametaphosphate.

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