| 1. 1 pts. |
The acid in our stomach, that helps to break down food during digestion is | |
| A. | hydrochloric acid | |
| B. | nitric acid | |
| C. | sulphuric acid | |
| D. | vinegar | |
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| 2. 1 pts. |
An alkali has a pH of | |
| A. | 7 | |
| B. | less than 7 | |
| C. | greater than 7 | |
| D. | 14 | |
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| 3. 1 pts. |
An acid has a pH of | |
| A. | 7 | |
| B. | less than 7 | |
| C. | greater than 7 | |
| D. | 1 | |
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| 4. 1 pts. |
An example of a commonly used alkali is | |
| A. | citric acid | |
| B. | sodium hydroxide | |
| C. | vinegar | |
| D. | sodium tartrate | |
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| 5. 1 pts. |
Ammonia is a weaker alkali than sodium hydroxide. Its pH is likely to be….. | |
| A. | 1 | |
| B. | 4 | |
| C. | 9 | |
| D. | 14 | |
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| 6. 1 pts. |
Citric acid occurs naturally in……. | |
| A. | potatoes | |
| B. | limestone | |
| C. | lemons | |
| D. | table salt | |
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| 7. 1 pts. |
Which one of the following statements is correct for acids? Acids | |
| A. | have a pH greater than7 | |
| B. | give off a smoke | |
| C. | have pH equal to 7 | |
| D. | are corrosive | |
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| 8. 1 pts. |
Maryam stated that a bottle contained a weak acid. She knew this because | |
| A. | she had tested it with pH indicator and found its pH was 1 | |
| B. | she had tested it with pH indicator and found its pH was 5 | |
| C. | she had tested it with pH indicator and found its pH was 9 | |
| D. | she had tested it with pH indicator and found its pH was 13 | |
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| 9. 1 pts. |
Hamish found a bottle containing a solution. He wasn’t sure what it was, and tested it with pH paper. He said it was a strong alkali. He knew this because | |
| A. | he found it had a pH of 1 | |
| B. | he found it had a pH of 5 | |
| C. | he found it had a pH of 7 | |
| D. | he found it had a pH of 14 | |
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| 10. 1 pts. |
Which of the following household substances would be an alkali? | |
| A. | apple juice | |
| B. | window cleaner | |
| C. | Pepsi | |
| D. | pure water | |
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| 11. 1 pts. |
If we add some water to a solution of strong acid | |
| A. | its pH will increase because it becomes more dilute | |
| B. | its pH will decrease because it becomes more dilute | |
| C. | its pH will increase because it becomes more concentrated | |
| D. | its pH will decrease because it becomes more concentrated | |
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| 12. 1 pts. |
Choose the word from the options to correctly complete the following statement. The ___________ scale measures the acidity of a substance | |
| A. | neutral | |
| B. | pH | |
| C. | acid | |
| D. | litmus paper | |
| E. | universal indicator | |
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| 13. 1 pts. |
When in the presence of a strong acid Universal indicator turns | |
| A. | red | |
| B. | yellow | |
| C. | green | |
| D. | blue | |
| E. | purple | |
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| 14. 1 pts. |
When in the presence of a weak alkali, Universal indicator turns | |
| A. | red | |
| B. | yellow | |
| C. | green | |
| D. | blue | |
| E. | purple | |
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| 15. 1 pts. |
A student tested a solution with Universal indicator. It turned yellow. This most likely meant that the solution he had was | |
| A. | a strong acid | |
| B. | a strong alkali | |
| C. | a weak acid | |
| D. | a weak alkali | |
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