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  • The following four solutions are kept in separate beakers and copper metal is put in each of them. Which solution will become blue after some timeOption: 1</stro

The following four solutions are kept in separate beakers and copper metal is put in each of them. Which solution will become blue after some time

Option: 1

\mathrm{AgNO}_{3}\ \text{Solution}


Option: 2

\mathrm{Zn}\left(\mathrm{NO}_{3}\right)_{2}\text{Solution}


Option: 3

\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}\text{Solution}


Option: 4

\mathrm{NaNO}_{3}\ \text{Solution}


Answers (1)

best_answer

Copper will reduce \text{Ag}^{+} and itself convert into \text{Cu}^{2+} which gives blue colouration

\mathrm{Cu}+2 \mathrm{AgNO}_{3} \rightarrow \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+2 \mathrm{Ag}

\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+4 \mathrm{H}{ }_{2} \mathrm{O} \rightarrow\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}\right]\left(\mathrm{NO}_{3}\right)_{2}

Hence, the correct answer is Option (1)

Posted by

Irshad Anwar

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