a) What is the chemicals in plastic and what are the physical and chemical properties of it.

Explain the meaning of malleable and ductile.

1)Which one of the following statements is not true about ways materials can be smart? React when exposed to all media React when exposed to only specific media Separate substances Recognize certain molecules Bind to certain molecules   2) Select all correct statements about Catalysts a-They breakdown and enter chemical reactions and get consumed b-They assist chemical reactions but do not get consumed c-Biological catalysts are enzymes in the body d-enzymes facilitates the breakdown of starch into simple sugars e-Catalyst is a substance that performs cathalicism f-catalyst is a section of the exhaust that is connected to tube where the tail pipes and header   3)Which following statements is not true about Nano-Sieves -Chemical Reactivity can be related to surface area -More surface area = more sites for molecules to bind, interact and react -Breaking blocks into smaller chunks and then into small particles increases surface area -As particle size…

4. Plastics are made from what starting material? a. plants b. animals C. petroleum or oil d. air

Discuss the different synthetic rubbers with their specific properties and uses.

the polymers in question are : a) PVC b) PS c) PP

The difference between rubber bands and car tyres is that: a.)Tyres are made through a process of romulisation b.)Rubber bands are made through a process of romulisation c.)Tyres have more cross links than rubber bands d.)Rubber bands have more cross links than tyres do

which of the following are true about waste disposal of polymers?

What are the difference and similarities  between "organic food/farming" and "organic chemistry"?

From your life, identify several object that made of polymer?