Higher Chem Extracting metals and Life Cycle Assessments

Most copper is extracted by roasting copper rich ores. What is this process known as?

(a)  

Copper can be extracted from solutions of copper compounds by (a)   or by displacement using scrap iron.

New techniques to extract copper involve the use of bacteria, by what name is this known?

(a)  

Where is copper in the periodic table? Choose one answer

• in the central block

• in Group 1

• in the noble gas group

Litter that is plastic waste needs to be removed from beaches because it

• decomposes

• is flammable

• is not biodegradable

The UK government has set a target to recycle 30% of plastic waste. How are resources saved by recycling more plastics? Less (a)   is/are used.

Cans for food and drinks are made from steel or aluminium.The main metal in steel is iron. Iron is extracted by heating a mixture of iron oxide and carbon in a blast furnace. Name this process.

(a)  

During one year in the USA: • 100 billion aluminium cans were sold • 55 billion aluminium cans were recycled. Give one environmental impact of recycling aluminium cans

(a)