Q.1.
If aluminium cans are not recycled, they can have a huge impact on the environment in which of the following ways?
Q.2.
Some iron is obtained by recycling scrap iron. Why does it take less energy to make iron from scrap iron than to extract the iron from its ore?
Q.3.
Scientists have been looking for alternative methods to extract copper from the ground. One of these methods is bioleaching. What does bioleaching use to extract copper?
Q.4.
A disadvantage of extracting aluminium from aluminium ore is...
Q.5.
Recycling metals is often thought of as a better way to provide more metals. Which of the following is NOT an advantage of recycling?
Q.6.
Which of the following is a disadvantage of bioleaching rather than extracting copper by the traditional method?
Q.7.
Economically, it is more sensible to recycle aluminium, because extracting it from its ore...
Q.8.
Most titanium is extracted from titanium oxide ore. The oxide is first converted to titanium chloride. The titanium chloride is then reacted with sodium. This method of extracting titanium is very expensive. Recycling titanium would increase if...
Q.9.
It is better to recycle aluminium than to extract it from aluminium ore because...
Q.10.
Removing metal ores from the ground usually involves mining. Which of the following is NOT an environmental impact of mining?