question_answer

Water is used to extinguish fire because if (a) Has a very low freezing point (b) Lowers the ignition temperature of the burning substance (c) Decomposes on heating to give oxygen and hydrogen which are not combustible substances (d) Cools the burning substance so that its temperature becomes lower than its ignition temperature

Answer:

Ignition temperature is the minimum temperature at which a substance starts burning. When water is poured over a burning substance, it absorbs heat from the substance and gets converted to steam. As a result, the temperature of the substance falls below the ignition temperature and it stops burning.