Question

$C{O}_2$ is used for extinguishing fire because ?

• A. it has relatively high critical temperature
• B. in solid state, it is called dry ice
• C. it is neither combustible nor a supporters of combustion
• D. it is colourless gas

Answer 1

The correct option is C it is neither combustible nor a supporters of combustion

Gases which are neither combustible nor supporters of combustion are used as fire extinguishers. Combustible gases would act as fuel for the fire and supporters of combustion will aid the combustion process. A gas which is neither of the above will stop the fire due to the non-availability of fuel and supporter.