Question

When sodium bicarbonate reacts with dilute hydrochloric acid, the gas evolved is ______.

विकल्प

• Hydrogen; it given pop sound with burning match stick.

• Hydrogen; it turns lime water milky.

• Carbon dioxide; it turns lime water milky.

• Carbon dioxide; it blows off a burning match stick with a pop sound.

Answer 1

When sodium bicarbonate reacts with dilute hydrochloric acid, the gas evolved is Carbon dioxide; it turns lime water milky.

Explanation:

Test tube B: \[\ce{NaHCO3(s) + HCl(aq)->NaCl(aq) + H2O(l) + CO2(g)}\]

After passing through lime water, carbon dioxide gas evolved.

\[\ce{\underset{(Lime water)}{Ca(OH)2(aq) + CO_2(g)} -> \underset{(White precipitate)}{CaCO3(s) + H2O(l)}}\]