12. Match the commercial names of the material given in Column I with their chemical composition...
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012. Match the commercial names of the material given in Column I with their chemical composition given in Column II
Column I Column II
(Commercial name) (Composition)
(i) Permutit
(a) \( \mathrm{NaAlO}_{2} \)
(ii) Calgon
(b) \( \mathrm{Na}_{2}\left[\mathrm{Na}_{4}\left(\mathrm{PO}_{3}\right)_{6}\right] \)
(c) \( \mathrm{Na}_{2} \mathrm{Al}_{2} \mathrm{Si}_{2} \mathrm{O}_{8} x \mathrm{H}_{2} \mathrm{O} \)
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