791797
Descrição
Criado por Chloe Roberts
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Criado por Chloe Roberts
mais de 12 anos atrás
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| Questão | Responda |
| Give three reasons why fractions from crude oil are cracked | Contains too many large hydrocarbons --- Do not flow easy --- Difficult to ignite |
| What does cracking produce? | Alkane's and Alkene's |
| Are Alkenes saturated or unsaturated | Unsaturated |
| What Colour does Alkenes turn bromine water | From Orange to Colourless |
| Give two ways how hydrocarbon molecules be cracked | Heating them with steam to a very high temperature --- Passing their vapours over a hot catalyst |
| What is a polymer? | Plastics are large molecules made when many small molecules join together |
| What makes Polymers? | Monomers |
| What are plastics made of | Polymers |
| What can alkenes be used to make? | Polymers such as poly(ethene) and poly(propene) |
| Describe one use of a smart polymer | A shape memory Stitch |
| How does a Shape memory stitch work? | It uses the temperature of the body to make the threat tighten and close the wound |
| What does 'Biodegradeable' mean? | A substance or object capable of being decomposed by bacteria or other living organisms and thereby avoiding pollution |
| 3 ways of reducing plastic waste | Reuse Bags and bottles --- Make more Biodegradeable products --- Use recycling bins |
| Outline the two ways that can be used to make ethanol and give an advantage and a disadvantage of each method. | Fermenting sugar using enzymes in yeast = Sustainable only uses plant material ➝➝➝ Hydration of ethene with steam in the presence of a catalyst = Unsustainable needs crude oil |
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