15 Jun Which correctly ranks substances from lowest to highest pH
Question
Which correctly ranks substances from lowest to highest pH:
1. Distilled water, Lemon juice, Bleach.
2. Coffee, Distilled water, Ammonia.
3. Ammonia, Distilled water, Lemon juice.
4. Seawater, Vinegar, Distilled water.
Which correctly ranks substances from least acidic to most acidic:
1. Bleach, Distilled water, Battery acid.
2. Battery acid, Distilled water, Bleach.
3. Seawater, Ammonia, Bleach.
4. Coffee, Distilled water, Battery acid.
When you added hydrogen peroxide to potato pieces, you observed bubbling. Which of the following statements about this reaction is FALSE?
1. Hydrogen peroxide is broken down to water and oxygen.
2. Potatoes contain the enzyme catalase.
3. Catalase breaks down to oxygen, producing bubbles.
4. The higher the activity of catalase, the more bubbles will be observed.
5. Hydrogen peroxide contains 2 hydrogen and 2 oxygen atoms.
The negative control for an experiment is designed to contain all the elements of the test except the factor to be tested.
If you are intending to test the activity of catalase in lettuce at different temperatures, which would be the most important (has to be included) negative control?
1. lettuce, hydrogen peroxide
2. water, hydrogen peroxide
3. lettuce, water
4. water only
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