Question

Draw a well labeled diagram of fire extinguisher.

Answer 1

The Fire extinguisher-

• It is a device used to put out a fire.
• A common form is the soda-acid fire extinguisher.
• It consists of a metal cylinder filled with sodium bicarbonate.
• A glass bottle of sulphuric acid (H₂SO₄) is placed inside which can be broken by striking the knob when needed.
• Carbon dioxide (CO₂) gas is produced which passes through the nozzle and extinguishes the fire.

The reaction taking place in a fire extinguisher -

$\underset{\mathrm{Sodium}\mathrm{bicarbonate}}{2{\mathrm{NaHCO}}_3\left(\mathrm{s}\right)}+\underset{\mathrm{Sulphuric}\mathrm{acid}}{{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}\to \underset{\mathrm{Sodium}\mathrm{sulphate}}{{\mathrm{Na}}_2{\mathrm{SO}}_4(\mathrm{s}})+\underset{\mathrm{Water}}{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{2{\mathrm{CO}}_2\left(\mathrm{g}\right)(\uparrow )}$

• Nowadays fire extinguisher is smaller sizes and is available for household purposes.
• Every city has a fire station from where help can be sought in case of a fire break.
• Most public places have devices to prevent fires.
• There are three main types of fire extinguishers-

1. Water extinguisher
2. Liquefied gas extinguisher
3. Dry chemical extinguisher

Fire Extinguisher