Question

Why is CO2 collected by downward delivery in preparation?

a. To prevent the escape of CO2 gas
b. To ensure safety in handling CO2
c. To collect impurities along with CO2
d. To increase the efficiency of CO2 collection

Answer 1

CO2 is collected by downward delivery in preparation to prevent the escape of CO2 gas.

Step-by-step explanation:

CO2 is collected by downward delivery in preparation to prevent the escape of CO2 gas. When CO2 is produced in a chemical reaction, it is less dense than water and does not dissolve in water. By collecting CO2 gas through downward delivery, it is trapped in the upper part of the collection apparatus and does not escape.