MathematicsA substance X which is used as an antacid reacts with dilute HCl to produce a gas Y which is used in one type of fire extinguisher. Name the substance X and gas Y.

A substance X which is used as an antacid reacts with dilute HCl to produce a gas Y which is used in one type of fire extinguisher. Name the substance X and gas Y.


  1. A
    Sodium carbonate , CO2
  2. B
    Sodium bicarbonate , CO2
  3. C
    Sodium carbonate , Sodium bicarbonate
  4. D
    CO2 , CO2 

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    Solution:

    Concept- Types of fire extinguishers and its components
    1- Five general types of fire extinguishers - water, foam, dry powder, wet chemicals and CO2 gas.
    2-  The gas produced in the reaction - used in a type of fire extinguisher, the gas Y = carbon dioxide, CO2.
    3- Carbon dioxide is produced when X reacts with HCl, so X can be  either sodium carbonate or sodium bicarbonate. 4- sodium carbonate is a caustic base. It is not edible and cannot be used as an antacid.
    So, the option 2 is correct - X is sodium bicarbonate (baking soda) and Y is carbon dioxide gas.
    Hence, the correct option is (2).
     
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