General Science Chemistry

Which of the following is the chemical reaction involved in the baking soda preparation?

1
NaHCO3 + H+ → CO2 + H2O + Sodium salt of acid
2
NaCl + H2O + CO2 + NH3  → NH4Cl + NaHCO3
3
Ca(OH)2 + Cl2 → CaOCl2 + H2O
4
2NaCl (aq) + 2H2O(I) → 2NaOH (aq) + Cl2 (g) + H2 (g)

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