Question

Recycling of aluminium requires _________ of energy to make new aluminium.

(a) 0.5%

(b) 25%

(c) 5%

(d) 50%

I got this question in a national level competition.

This intriguing question comes from Chemical Processes of Aluminium in portion Wrought Aluminium Alloys of Aerospace Materials & Processes

Answer 1

Right option is (c) 5%

Best explanation: Aluminium can be absolutely recycled. In any of its forms for example tins, cans, etc. it can be taken to a plant where it is treated. In this process, only five percent of energy is required to manufacture new aluminium.