Teaching CTET (Paper 1 & Paper 2) Mock Test Series 2025 General Science Chemistry

Substance X, which is used as an antacid, reacts with dilute hydrochloric acid to produce a gas Y, which is used in one type of fire extinguisher. The substance X and gas Y, respectively, are: 

1
NaHCO3, CO 
2
NaCl, CO2
3
NaHCO3, CO2
4
NaOH, CO2
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