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Periodic Classification of Elements — Science STD 10 — Question

Tamilnadu BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
Question
What happens when copper is treated with conc.HNO3 and with conc.H2SO4?
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Answer

Conc.
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Cu +4 HNO _3 \longrightarrow Cu \left( NO _3\right)_2+2 NO _2 \uparrow+2 H _2 O
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Copper nitrate Nitrogen dioxide
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Cu +2 H _2 SO _4 \longrightarrow CuSO _4+ SO _2 \uparrow+ H _2 O
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Copper sulphate

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