What is the percentage of iron in the iron from a blast furnace? 100% 96% 4%
Back
Card 7
Front
Which type of steel is likely to be used for making cutlery? Low carbon steel High carbon steel Stainless steel
Back
Card 8
Front
What process is used to purify copper? Electrolysis Filtration Reduction in a blast furnace
Back
Card 9
Front
Why is titanium expensive to extract from its ore? It resists corrosion. Several stages are involved. Its ore is rare.
Back
Card 10
Front
Phytomining involves: using plants to absorb metal compounds using bacteria to absorb metal compounds using chemicals to absorb metal compounds
Back
Card 11
Front
Copper can be obtained by reacting solutions of copper compounds with scrap iron. This sort of reaction is called: electrolysis displacement combustion
Back
Card 12
Front
What do we call the compounds that contain only carbon and hydrogen atoms?Carbohydrates Carbohydrogens Hydrocarbons
Back
Card 13
Front
Which of the following describes the top of an oil fractionating column? It's hotter than the bottom of the column. It's colder than the bottom of the column. It's the same temperature as the bottom of the column.
Back
Card 14
Front
What happens to a liquid during its separation from a mixture by distillation? Condensing followed by evaporating Evaporating followed by condensing Evaporating followed by freezing
Back
Card 15
Front
In comparison with large hydrocarbons, how would you describe small hydrocarbons? They are more viscous. They are less flammable. They are more volatile.
