Question

5. When aqueous sodium carbonate (Na2CO3) reacts with HCl (aq), it gives
(a) NaOH, H2(g) and CO2(g)
(b) NaCl, H2O and CO2(g)
(c) NaHCO3, H2(g) and CO2(g)
(d) NaHCO3, H2O and CO2(g)
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Answer 1

Answer

(a) Na2CO3 + HCl —→ NaCl + NaHCO3. (b) NaHCO3 + HCl —→ NaCl + H2O + CO2 ... (a) Carbon dioxide (CO2) gas turns lime water milky when passed ... (e) NaOH solution. Zn(s) + 2 NaOH (aq) →. Na2ZnO2 (aq) + H2 (g). Sodium ... Sodium hydrogencarbonate on heating gives CO2 gas

Answer 2

Answer:

(b) NaCl, H2O and CO2(g)

Explanation:

• Sodium carbonate is an inorganic compound which is also known as Soda ash which is basic in nature.
• Sodium carbonate is a base that reacts with an acid, i.e., hydrochloric acid to give salt along with carbon dioxide and water.
• Effervescence is observed, indicating the presence of carbon dioxide gas.

Na₂CO₃₍s₎ + 2HCl₍aq₎ ----------> 2NaCl₍aq₎ + CO₂₍g₎ +H₂O₍l₎

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