Question

The manufacturing of which of the following involve carbon dioxide?

• A. Fire extinguishers
• B. Sulphuric acid
• C. Table salt
• D. Aerated drinks

Answer 1

Answer: (A), (D)

Aerated drinks

• Carbon dioxide $\left(C{O}_2\right)$ gas is heavier than air and hence, it is used in fire extinguishers.
• Aerated drinks contain carbonic acid $\left(H_{2}C{O}_3\right)$ in them, which is obtained when $C{O}_2$ dissolves in water as shown below.

${\mathrm{CO}}_2\left(g\right)+H_{2}O\left(l\right)\to H_2{\mathrm{CO}}_3\left(\mathrm{aq}\right)\mathrm{Carbon}\mathrm{Water}\mathrm{Carbonic}\mathrm{dioxide}\mathrm{acid}$

• Sulphuric acid $\left(H_{2}S{O}_4\right)$ is obtained by passing sulphur dioxide $\left(S{O}_2\right)$ gas through water and hence its manufacturing does not involve $C{O}_2$.
• Table salt is the common name for sodium chloride $\left(NaCl\right)$ and it does not involve $C{O}_2$ in its manufacturing.