Question

While conducting an experiment using pyrophorics, it comes in contact with air and ignites. what kind of extinguisher should be available in the lab?

Answer 1

When the pyrophoric comes in contact and catch fire then class D fire extinguisher should be available to extinguish the fire.

Further explanation:

Fire extinguisher:

The fire extinguisher is a device to protect from fire. It basically extinguishes the fire.

There are mainly four classes of fire extinguisher.

(1) Class A: These fire extinguisher sare used in case of fire comes from ordinary combustibles such as wood and paper.

(2) Class B: These fire extinguishers are used only in case of fire comes flammable liquids such as oil and gasoline.

(3) Class C: These fire extinguishers are used only in the case of electrically energized fires.

(4) Class D: These fire extinguishers are used in case of fire comes flammable metal such as titanium, sodium, and magnesium.

The pyrophoric means the material which can be able to ignite spontaneously when it comes in contact with air. Therefore the fire extinguisher which is most suited with pyrophoric substance is class D fire extinguisher.

Learn more:

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Answer details:

Grade: Senior school

Subject: Chemistry

Chapter: Environmental health and safety

Keywords: Experiment, prophorics, substance lab work, fire extinguisher, class of fire extinguisher, A class, B class, C class, D class.

Answer 2

The correct answer is class D extinguisher.  

The pyrophoric materials refer to the components, which ignite briskly after coming in contact with oxygen. These substances can also be water reactive, where hydrogen and heat get produced. A pyrophoric substance ignites continuously in the air at or below 55 degree Celsius.  

While working on pyrophoric substances, a class D fire extinguisher is used. A class D fire extinguisher is utilized on combustible metals like titanium, magnesium, sodium, and others that need an extinguishing medium, which does not react with the burning metal.