Fuel Sulfur content / % P 2.1 Q 0.1 R 1.3 S 0.5 Four fuels are burned in power stations. The bar chart shows the sulfur dioxide released by each, and the ta...
Question 1 Report
| Fuel | Sulfur content / % |
|---|---|
| P | 2.1 |
| Q | 0.1 |
| R | 1.3 |
| S | 0.5 |
Four fuels are burned in power stations. The bar chart shows the sulfur dioxide released by each, and the table gives the sulfur content of each fuel. Which fuel should be avoided to cut down acid rain most?
Answer Details
Acid rain comes from sulfur dioxide, which is formed when the sulfur impurity in a fuel burns: S + O2 → SO2. So the fuel to avoid is the one releasing most sulfur dioxide.
Both sets of data agree. In the table the sulfur contents are 2.1%, 0.1%, 1.3% and 0.5%, and fuel P is highest at 2.1%. On the bar chart the bar for P is also by far the tallest, while the bar for Q is the shortest, matching its 0.1% sulfur. Fuel P is therefore the one to avoid.
Fuel Q would be the best choice, not the worst, so picking the smallest bar is the usual error. Check that the chart and the table tell the same story before answering.
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