When dilute Hydrochloric acid (HCl) reacts with Sodium Hydrogen Carbonte (NaHCO3), which is the product formed along with Sodium chloride(NaCl) and Water(H₂O)?

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Question

RRB NTPC - 2025

General Science

When dilute Hydrochloric acid (HCl) reacts with Sodium Hydrogen Carbonate (NaHCO₃), which is the product formed along with Sodium chloride (NaCl) and Water (H₂O)?

This question was previously asked in

RRB NTPC 2025 Under Graduate CBT 2 Question Paper PDF (17-Sep-2026) (Shift 1)

Ammonium Chloride (NH₄Cl)

Chloroform (CHCl₃)

Hydrogen gas (H₂)

Carbon Dioxide (CO₂)

The correct answer is

Carbon Dioxide (CO₂)

Dilute hydrochloric acid reacts with sodium hydrogen carbonate (baking soda) in a typical acid–carbonate reaction.

The balanced equation is: HCl + NaHCO₃ → NaCl + H₂O + CO₂.

An acid reacting with a hydrogencarbonate (bicarbonate) always liberates carbon dioxide gas, which is why the mixture fizzes/effervesces; the CO₂ turns lime water milky.

Hence, along with sodium chloride and water, the gas produced is Carbon Dioxide (CO₂).

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