Question

Which one of the following does not produce $O_{2}$ as the only gaseous product on heating?

• A. Lead Nitrate
• B. Potassium Chlorate
• C. Mercuric Oxide
• D. Potassium Nitrate

Answer 1

Answer: (A)

Lead Nitrate

Answer 2

$\left(A\right)pb\left(NO_{3}\right)_{2} \left(s\right)$ $\ce{ ->[ \Delta ] }$PbO$\left(s\right)+2NO_{2}\left(g\right)+\frac{1}{2}O_{2}\left(g\right)$
$\left(B\right) KClO_{3} \left(s\right)$ $\ce{ ->[ \Delta] }$ $kcl \left(s\right)+\frac{3}{2} O_{2} \left(g\right)$
$\left(C\right) HgO \left(s\right)$ $\ce{ ->[\Delta] }$ $Hg \left(l\right)+\frac{1}{2}O_{2} \left(g\right)$
$\left(D\right)KNO_{3} \left(s\right)$ $\ce{ ->[\Delta] }$ $KNO_{2} \left(s\right)+\frac{1}{2}O_{2} \left(g\right)$