What do you see when concentrated nitric acid is added to copper.

green coloured gas

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colourless gas

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reddish brown coloured gas

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yellowish coloured gas

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Solution

The correct option is C reddish brown coloured gas
Pinkish red metal dissolves in nitric acid to give blue coloured solution of copper nitrate and a reddish brown coloured gas of nitrogen dioxide.
$C u + 4 {H N O}_{3} (c o n c .) \to C u {({N O}_{3})}_{2} + {2 H}_{2} O + {2 N O}_{2}$

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What do you see when concentrated nitric acid is added to copper.

The correct option is C reddish brown coloured gasPinkish red metal dissolves in nitric acid to give blue coloured solution of copper nitrate and a reddish brown coloured gas of nitrogen dioxide.Cu+4HNO3(conc.)→Cu(NO3)2+2H2O+2NO2

The correct option is C reddish brown coloured gas
Pinkish red metal dissolves in nitric acid to give blue coloured solution of copper nitrate and a reddish brown coloured gas of nitrogen dioxide.
$C u + 4 {H N O}_{3} (c o n c .) \to C u {({N O}_{3})}_{2} + {2 H}_{2} O + {2 N O}_{2}$