Question

E. Tick the most appropriate answer:

2. $2{\mathrm{NaHCO}}_3\to {\mathrm{NaCO}}_3+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$ ,

In the above formula of :

• A. sodium bicarbonate is incorrect
• B. sodium carbonate is incorrect
• C. carbon dioxide is incorrect
• D. water is incorrect

Answer 1

The correct option is B

sodium carbonate is incorrect

Explanation:

• The given reaction is: $2{\mathrm{NaHCO}}_3\to {\mathrm{NaCO}}_3+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$
• This is an unbalanced equation and an incorrect equation.
• The balanced and correct equation will be:
• $\underset{\mathrm{Sodium}\mathrm{bicarbonate}\mathrm{Sodium}\mathrm{carbonate}\mathrm{water}\mathrm{Carbon}\mathrm{dioxide}}{2{\mathrm{NaHCO}}_3\to {\mathrm{Na}}_2{\mathrm{CO}}_3+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2}$
• Therefore, the molecular formula of Sodium carbonate is ${\mathrm{Na}}_2{\mathrm{CO}}_3$ not ${\mathrm{NaCO}}_3$

Hence, option (B) is the correct answer.