Question

${\text{NaHCO}}_3$ on heating gives out:

• A. $\text{NaOH}$
• B. $\text{NaCl}$
• C. ${\text{Na}}_2{\text{CO}}_3$
• D. ${\text{NaHCO}}_3$

Answer 1

The correct option is C ${\text{Na}}_2{\text{CO}}_3$

${\text{NaHCO}}_3$ is sodium bicarbonate which is known as baking soda. On heating, it gives out sodium carbonate (${\text{Na}}_2{\text{CO}}_3$), carbon dioxide (${\text{CO}}_2$) and water (${\text{H}}_2\text{O}$). The reaction involved is:

$2{\mathrm{NaHCO}}_3\left(s\right)\to {\mathrm{Na}}_2{\mathrm{CO}}_3\left(s\right)+H_{2}O\left(g\right)+{\mathrm{CO}}_2\left(g\right)$