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Q.

Calgon is chemically

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a

${Na}_{2} {HPO}_{4}$

b

${Na}_{3} {PO}_{4}$

c

${Na}_{6} P_{6} O_{18}$

d

${NaH}_{2} {PO}_{4}$

answer is C.

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Detailed Solution

Sodium hexametaphosphate is called CALGON . Its chemical formula is ${Na}_{6} P_{6} O_{18}$

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