GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Suppose you have a bag of cans that you want to recycle. The recycling center accepts only aluminum cans. You know that some of your cans contains steel. You would probably find it difficult to tell aluminum cans from steel ones just by looking a them. How would you separate the cans?
A
use magnet to separate aluminum from steel
B
boil them to separate aluminum from steel
C
place them in water to separate aluminum from steel
D
all of the above
Explanation: 

Detailed explanation-1: -Recyclable materials include many kinds of glass, paper, cardboard, metal, plastic, tires, textiles, batteries, and electronics. The composting and other reuse of biodegradable waste-such as food and garden waste-is also a form of recycling.

Detailed explanation-2: -The aluminum cans are separated out during the sorting process and baled together. That bale is then sold to a company that will transform the recycled material into the cans you use. So, in as little as 30 days later, that same can will take on a new life back on the grocery store shelf.

Detailed explanation-3: -All metal cans are infinitely recyclable. It doesn’t matter if they are aluminum drink cans or tin, steel, or bi-metal food cans. Go ahead and throw them into your recycling bin.

Detailed explanation-4: -A lot of the things that people trash can be recycled. Prime examples include paper, newspaper, corrugated cardboard, high-grade paper, aluminum, steel (tin) cans, glass, plastic, motor oil, organic waste, and scrap metals. Some notes on recycling: Paper with residues cannot be recycled in most cases.

There is 1 question to complete.