Yes, portable dry chemical fire extinguishers are pressurized by means of nitrogen (expellant gas used to discharge the extinguishing agent from its container). Carbon dioxide can also be used as expellant gas. Usually carbon dioxide is used for temperatures ranges of 0oC to +49oC, and nitrogen for extreme temperature ranges of -54oC to +99oC.
N2, you know nitrogen gas
Nitrogen can be used in fire extinguishers as gas propellant.
powder or foam :)
BC type Dry powder extinguisher is the hydrocarbon extinguisher since it is used for extinguishing hydrocarbon fires.
liquid and electrical fires.
dry powder
A dry powder fire extinguisher is mostly recommended for use in vehicles and in the home. So basically they are usually used for small fire emergencies.
There is no liquid powder extinguisher on the market.
A car extinguisher may be necessary for putting out several different types of fires, so it should be a Class A:B:C extinguisher, normally dry powder. For an irreplaceable classic, one might consider a CO2 or a "clean agent" extinguisher, to avoid the damage potential of dry powder chemical extinguishers.
Co2 is the main gas used. Other things are water, foam, dry powder, class d powder etc.
Carbon dioxide, or foam, or dry powder. At no time should a soda water extinguisher be used, as the water will cause the burning gasoline to flare up and spread even further.
Carbon Dioxide(CO2) or Dry Powder.