Question

Chlorine gas reacts with red hot calcium oxide to give

• A. Bleaching powder and di hlorine monoxide
• B. Bleaching powder and water
• C. Calcium chloride and chlorine dioxide
• D. Calcium chloride and oxygen

Answer 1

Answer: (D)

$2CaO+C{l}_2\stackrel{\text{ Red hot }}{⟶}CaC{l}_2+O_2\uparrow$
From Arrhenius equation
$\ln \frac{k_2}{k_1}=\frac{E_a}{R}\left[\frac{1}{T_1}-\frac{1}{T_2}\right]$
or $\ln \frac{k_2}{k_1}=\frac{600R}{R}\left(\frac{1}{300}-\frac{1}{600}\right)$
or $\ln \frac{k_2}{k_1}=600\left(\frac{2-1}{600}\right)$
or $\ln \frac{k_2}{k_1}=1$ or $\frac{k_2}{k_1}=e$