Question

Complete the following reaction:
$2\mathrm{Cu}\left(s\right)+O_2\left(g\right)\to$

• A. ${\mathrm{Cu}}_{2}O$
• B. ${\mathrm{Cu}}_3{O}_2$
• C. $2\mathrm{CuO}$
• D. ${\mathrm{CuO}}_2$

Answer 1

The correct option is C $2\mathrm{CuO}$

Metals on reacting with oxygen gives metal oxides. Copper when heated in air, combines with oxygen to form a black colour oxide which is copper(II) oxide. The complete balanced reaction is:
$2\mathrm{Cu}\left(s\right)+O_2\left(g\right)\to 2\mathrm{CuO}\left(s\right)$