When a lot of dry powder of a substance X is released over a fire, the fire gets extinguished. (a) Name the substance X. (b) How does this substance extinguish the fire? (c) Name another substance which behaves like X.

Question

Philoid · Accepted Answer

(a) Sodiumbicarbonate (sodiumhydrogencarbonate)

(b) The heat of fire decomposes sodium bicarbonate to produce carbondioxide gas. This carbon dioxide covers the fire like a blanket and cuts off supply of fresh air to the burning substance. Due to this the fire gets extinguished

(c) Potassium bicarbonate(or Potassium hydrogen carbonate)

When a lot of dry powder of a substance X is released over a fire, the fire gets extinguished.(a) Name the substance X.(b) How does this substance extinguish the fire?(c) Name another substance which behaves like X.

When a lot of dry powder of a substance X is released over a fire, the fire gets extinguished.
(a) Name the substance X.

(b) How does this substance extinguish the fire?

(c) Name another substance which behaves like X.