1. In Cracking, the vapour is either passed over a hot (blank) or mixed with steam
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2. which of these is NOT an advantage of phytomining?
- The materials are renewable
- Can release energy when plants are burned
- It is less expensive
- Plants will remove Carbon Dioxide from the air as they grow
3. cracking involves heating the (blank) to make a vapour
4. Which of these does NOT happen in polymerisation?
- a long molecule is created
- A polymer is created
- A catalyst is heated
- many monomers join together
5. when you heat calcum carbonate, what does it produce?
- calcium carbonate
- calcium hydroxide solution
- calcium oxide
- calcium hydroxide