Question

The chemicals used in a foam type fire extinguisher are

• A. NaHCO$_3$ and Na$_2$SO$_4$
• B. Al$_2$(SO$_4$)$_3$ and Na$_2$SO$_4$
• C. Al$_2$(SO$_4$)$_3$ and Al(OH)$_3$
• D. NaHCO$_3$ and Al$_2$(SO$_4$)

Hint:

Sodium bicarbonate (NaHCO$_3$) and aluminum sulfate (Al$_2$SO$_4$) are commonly used in foam-type fire extinguishers due to their foam-generating properties.

Answer 1

The Correct Option is D

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.