Question

In a lime kiln, to get higher yield of $CO_2$, the measure that can be taken is

• A. to maintain high temperature
• B. to pump out $CO_2$
• C. to remove CaO
• D. to add more $CaCO_3$

Answer 1

Answer: (B)

to pump out $CO_2$

Answer 2

The reaction taking place in a lime kiln is
${CaCO_3 (s) <=> CaO(s) + CO_2(g)}$
Removing one of the product will shift the equilibrium in the forward direction. As such removing $CO_2$ as and when it forms, will shift the equilibrium in the forward direction. This will increase the yield of $CO_2$