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  • Which of the following precipitate does not dissolve even in large excess of  <img alt="\mathrm{NH}_{4} \mathrm{OH}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BNH%7D_%7B4

Which of the following precipitate does not dissolve even in large excess of  \mathrm{NH}_{4} \mathrm{OH}?

Option: 1

\mathrm{AgCl}


Option: 2

\text{AgBr}


Option: 3

\text{AgI}


Option: 4

None of these


Answers (1)

best_answer

\mathrm{AgCl} and \mathrm{AgBr} dissolve in \mathrm{NH_4OH} and form complexes but \mathrm{AgI} doesn't react with \text{NH}_{4}\text{OH}.


The reaction with \mathrm{AgCl} occurs as given below :

\mathrm{AgCl}+2 \mathrm{NH}_{4} \mathrm{OH} \rightarrow\left[\mathrm{Ag}\left(\mathrm{NH}_{3}\right)_{2}\right] \mathrm{Cl}+2 \mathrm{H}_{2} \mathrm{O}

A similar reaction also occurs with \mathrm{AgBr}

Hence, the correct answer is Option (3)

Posted by

Divya Prakash Singh

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