Question

$C+2CuO\to X+Y$
The compound X and Y are:

• A. $C{O}_2,Cu$
• B. $CO,C{u}_{2}O$
• C. both A and B
• D. None of the above

Answer 1

The correct option is A $C{O}_2,Cu$

C and H are oxidized to $C{O}_2$ and $H_{2}O$ when heated with $CuO.$
$C{O}_2$ turns lime water milky and $H_{2}O$ turns anhydrous $CuS{O}_4$ to hydrated $CuS{O}_4$ which is blue in carbon.

Detection of C:
$C+2CuO\stackrel{\Delta }{\to }C{O}_2+2Cu$

$C{O}_2+Ca(OH{)}_2\stackrel{\Delta }{\to }CaC{O}_3+H_{2}O$

Detection of H:
$2H+CuO\stackrel{\Delta }{\to }{H}_{2}O+Cu$
$CuS{O}_4+5H_{2}O\stackrel{\Delta }{\to }CuS{O}_4.5H_{2}O$