Unit 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How does a catalyst work? | provides an alternative pathway with a lower activation energy.
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| Enzymes | biological catalyst
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| Advantages of using catalysts | lower temperature and pressure, save energy and cost
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| enzymes for catalysts | pure products with no side reactions
biodegradable enzymes, non toxic
food/drink and washing powders
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| Why are catalysts important | change chemical feedstock into useful products
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| Why are catalysts good for the environment? | lower temperature and pressure, less energy used and less fossil fuels released.
Reduce waste and provide a better atom economy
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| Bad for the environment? | do not last forever, need to be disposed of but many contain toxic chemicals or are valuble so need to be recycled.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
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