Question

the foam type extinguisher ____ is present in the bottle

Answer 1

The foam type extinguisher《 that or which 》is present in the bottle

Answer 2

Sodium bicarbonate in main container and aluminium sulphate in in a polythene container.

In foam type extinguisher, The main container is filled with sodium bicarbonate solution and a long inner polythene container is filled with aluminium sulphate. The inner container is sealed by a cap held in place by a plunger. When the plunger is unlocked by turning it, the cap is released. The extinguisher is then inverted for the two liquids to mix. Carbon dioxide is produced by the reaction that pressurises the container and forces out the foam.

The reaction is as follows;

Al2 (SO4)3 + 6 NaHCO3  -> 2Al (OH) 3 + 3Na2SO4 + 6 Co2