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Question

In an overheated oil kitchen fire , Rohit 's mother put a lot of  dry white powder 'X' on the pan. The fire got extinguished.

(A) What could be the dry powder 'X' ?

(B) How does 'X' extinguish the fire ?

( C) Name an another substance like 'X' used to extinguish fire.


Solution



(A) Sodium bicarbonate (IUPAC name:sodium hydrogen carbonate), commonly known as baking soda, is a chemical compound with the formula NaHCO3 

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

(C) Potassium hydrogen carbonate.

Chemistry

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