Periodic Classification of Elements — Science STD 10 — Question
Tamilnadu BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
Question
What is the action of heat on copper?
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Answer
On heating at different temperatures in the presence of oxygen, copper forms two types of oxides $CuO , Cu _2 O$.
$2 Cu + O _2 \underset{\Delta}{\stackrel{\text { below } 1370 K }{\longrightarrow}} 2 CuO \text { Copper (II) oxide - black }$
$4 Cu + O _2 \underset{\Delta}{\stackrel{\text { abovel370K }}{\longrightarrow}} 2 Cu _2 O \text { Copper (I) oxide - red } $
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