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gcse science C4 - F
specific for ocr gateway additonal science B.
| Question | Answer |
|---|---|
| why do chemicals have to be made in different ways? | because the amounts are so different |
| what process is used if something is needed in large amounts? | continuous process |
| what is an example of something produced using the continuous process? | ammonia |
| what process is used if something is needed in small amounts? | batch process |
| what is an example of something produced using the batch process? | medicines |
| what is an advantage of using batch process to make medicines? | new batches are made when the stored medicine runs low. if a lot of one medicine is needed, several batches can be made at the same time. |
| what are 3 advantages of using the continuous process? | -works at full capacity all the time -makes a large amount of product -employs very few people, so the cost per tonne is very small |
| what are 3 disadvantages of using the continuous process? | -costs an enormous amount to build -only designed to work at one level of output -can't easily change how much or what is made |
| what is the main advantage of using the batch process? | easy to change from making one compound to another |
| what are 2 disadvantages of using the batch process? | -have to be supervised - labour costs are higher -not used as efficiently as time is wasted emptying, filling and cleaning vessels |
| how does research, development and testing affect the cost of making medicines? | -takes many years to develop a new medicine -takes even longer to test its safety |
| how do the raw materials affect the cost of making medicines? | -may be rare and costly -may need to be extracted from plants that are difficult to find -separating the main chemical from the plant can be time consuming and expensive |
| how does being labour intensive affect the cost of making medicines? | -made by batch process, which needs supervision -less automation can be used |
| what four factors affect whether or not a drug is developed? | -cost: can be expensive as it takes time and labour costs are high -testing drugs to meet legal requirements can take years -there must be enough demand for the drug -length of time taken to pay back the initial investment is long |
Created by:
jirwin
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