Result:
1/10
1. Which of these would be an observation if vinegar were tested with blue litmus?
Turns blue litmus to red
Turns red litmus to blue
No color change
Changes color to green
2/10
2. If red litmus paper was dipped into soap water, what would likely happen?
The red litmus would stay red
The red litmus would turn blue
The red litmus would disappear
The red litmus would turn yellow
3/10
3. Which characteristic do all substances that turn blue litmus red have?
They are sweet
They are acidic
They are neutral
They are basic
4/10
4. What effect would a base like baking soda solution have on red litmus paper?
Turn it green
Turn it blue
No effect
Turn it pink
5/10
5. What would be observed if tamarind water was added to blue litmus paper?
Blue litmus turns red
Blue litmus turns green
No color change
Blue litmus turns purple
6/10
6. If a solution turned yellow when pathimugam water was added, what does this indicate?
The solution is basic
The solution is acidic
The solution is neutral
The solution is hot
7/10
7. What is an indicator in chemistry?
A device for measuring volume
A substance that changes color to identify acids and bases
A substance that emits light
A device to mix chemicals
8/10
8. Which indicator turns pink in a basic solution?
Methyl Orange
Litmus paper
Phenolphthalein
Universal indicator
9/10
9. Which of these indicators is used to identify both acids and bases by showing a range of colors?
Litmus paper
Phenolphthalein
Methyl Orange
Universal indicator
10/10
10. Which of the following is NOT a laboratory acid?
Hydrochloric acid
Sulfuric acid
Acetic acid
Ascorbic acid