The first dry chemical fire-extinguishing agent to be formulated was based on:

The first dry chemical fire-extinguishing agent to be formulated was based on:

The first dry chemical fire-extinguishing agent to be formulated was based on:



a. Sodium bicarbonate
b. Sodium chloride
c. Calcium nitrate
d. Calcium carbonate
e. Sodium carbonate.



Answer: A


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