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JEE Main202224 Jun 2022Evening ShiftChemistrys Block ElementsActual

Which one of the following compounds is used as a chemical in certain type of fire extinguishers

Options

  1. AWashing soda
  2. BBaking soda
  3. CCaustic soda
  4. DSoda ash

Correct answer

B. Baking soda

Step-by-step solution

2 NaHCO 3 ( aq ) + H 2 SO 4 ( aq ) → Na 2 SO 4 ( aq ) + 2 H 2 O ( l ) + 2 CO 2 ( g ) When the fire extinguisher is operated by pressing the knob on it, the sulphuric acid gets mixed with sodium bicarbonate solution producing a lot of carbon dioxide gas. Carbon dioxide gas is neither combustible nor helps combustion.

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