The chemicals used in a foam type fire extinguisher are
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- NaHCO$_3$ and Na$_2$SO$_4$
- Al$_2$(SO$_4$)$_3$ and Na$_2$SO$_4$
- Al$_2$(SO$_4$)$_3$ and Al(OH)$_3$
- NaHCO$_3$ and Al$_2$(SO$_4$)
The Correct Option is D
Solution and Explanation
Step 1: Understand the chemical composition of foam-type fire extinguishers.
Foam fire extinguishers use a mixture of chemicals that react to form foam, which helps to suppress fires by isolating the fire from the oxygen supply.
Step 2: Identify the chemicals in foam extinguishers.
(D) NaHCO$_3$ (sodium bicarbonate) and Al$_2$SO$_4$ (aluminum sulfate) are the chemicals involved in foam generation for fire extinguishing purposes.
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