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  • Which of the following pairs of ions when mixed in dilute solutions may give precipitate?Option: 1 <img alt="\mathrm{Na}^{+}, \mathrm{SO}_{4}^{2-}" s

Which of the following pairs of ions when mixed in dilute solutions may give precipitate?

Option: 1

\mathrm{Na}^{+}, \mathrm{SO}_{4}^{2-}


Option: 2

\mathrm{NH}_{4}^{+}, \mathrm{CO}_{3}^{2-}


Option: 3

\mathrm{Na}^{+}, \mathrm{S}^{2-}


Option: 4

\mathrm{Fe}^{3+}, \mathrm{PO}_{4}^{3-}


Answers (1)

best_answer

\mathrm{Fe}\left(\mathrm{PO}_{4}\right) is insoluble in water and hence upon mixing of solutions containing salts of \mathrm{Fe^{3+}} and \mathrm{PO_4^{3-}} we have the formation of a precipitate.

Hence, the correct answer is Option (4)

Posted by

Pankaj

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