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Copper metal reacts with \mathrm{NaNO_3} and \mathrm{H_2SO_4} to give a blue coloured compound A and a gas B which releases brown fumes. What is A and B?

Option: 1

\mathrm{CuSO_4\: and \: NO}


Option: 2

\mathrm{CuSO_4\: \: and\: \: NO_2}


Option: 3

\mathrm{Cu(NO_3)_2 \: and \: NO_2}


Option: 4

\mathrm{Cu(NO_3)_2\: and \: NO}


Answers (1)

best_answer

\mathrm{2NaNO_3 + 4H_2SO_4 + 3Cu \rightarrow 3 CuSO_4(Blue) + Na_2O_4 + 4H_2O + 2NO}

\mathrm{2NO + O_2 \rightarrow 2NO_2 (Brown \: \: fumes)}

Hence option 2 is correct.

Posted by

Sanket Gandhi

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