APPLE
1. Which substance is classified as an acid?
A. Toothpaste
B. Vinegar
C. Soap
D. Baking soda
B. Vinegar
2. What is the pH range of acids?
A. Above 7
B. Equal to 7
C. Below 7
D. Above 14
C. Below 7
3. Which household item is a base?
A. Lemon juice
B. Vinegar
C. Toothpaste
D. Soft drink
C. Toothpaste
What color does blue litmus paper turn in acid?
A. Red
B. Blue
C. Green
D. Yellow
A. Red
Which substance is considered neutral?
A. Pure water
B. Vinegar
C. Soap
D. Lemon juice
A. Pure water
Which of the following is an example of a salt?
A. Hydrochloric acid
B. Sodium chloride
C. Ammonia
D. Vinegar
B. Sodium chloride
What is produced when an acid reacts with a base?
A. Gas only
B. Water only
C. Salt and water
D. Heat only
C. Salt and water
Which indicator is commonly used to identify acids and bases?
A. Thermometer
B. pH paper
C. Ruler
D. Balance
B. pH paper
What taste is commonly associated with acids?
A. Bitter
B. Sweet
C. Sour
D. Salty
C. Sour
Bases usually feel ______.
A. Sticky
B. Slippery
C. Rough
D. Dry
B. Slippery
Which has a pH of exactly 7?
A. Acid
B. Base
C. Neutral solution
D. Salt only
C. Neutral solution
Which of these is a strong acid found in the stomach?
A. Sodium chloride
B. Hydrochloric acid
C. Calcium carbonate
D. Sodium hydroxide
B. Hydrochloric acid
Turmeric indicator changes to ______ in the presence of a base.
A. Yellow
B. Red-brown
C. Blue
D. Colorless
B. Red-brown
Which of the following is an example of neutralization?
A. Mixing vinegar and baking soda
B. Melting ice
C. Burning paper
D. Dissolving sugar
A. Mixing vinegar and baking soda
Seawater is generally classified as:
A. Acid
B. Base
C. Neutral
D. Strong acid
B. Base
What scale is used to measure acidity and basicity?
A. Celsius Scale
B. pH Scale
C. Richter Scale
D. Kelvin Scale
B. pH Scale
Which of the following is most likely a base?
A. Lemon juice
B. Orange juice
C. Soap solution
D. Vinegar
C. Soap solution
What color does red litmus paper turn in a base?
A. Red
B. Blue
C. Yellow
D. Green
B. Blue
Which acid is commonly found in citrus fruits?
A. Hydrochloric acid
B. Citric acid
C. Sulfuric acid
D. Carbonic acid
B. Citric acid
Which pH value indicates a strong base?
A. 2
B. 5
C. 7
D. 13
D. 13
Which substance contains carbonic acid?
A. Toothpaste
B. Soft drinks
C. Saltwater
D. Soap
B. Soft drinks
. Which of the following is commonly used as an antacid?
A. Vinegar
B. Baking soda
C. Lemon juice
D. Cola
B. Baking soda
. What happens to acids and bases during neutralization?
A. They form salt and water
B. They evaporate
C. They become solids
D. They disappear
A. They form salt and water
Which ion makes a solution basic?
A. Hydroxide ion (OH⁻)
B. Hydrogen ion (H⁺)
C. Sodium ion (Na⁺)
D. Oxygen ion (O₂)
A. Hydroxide ion (OH⁻)
Which ion is responsible for making a solution acidic?
A. Sodium ion (Na⁺)
B. Hydrogen ion (H⁺)
C. Chloride ion (Cl⁻)
D. Calcium ion (Ca²⁺)
B. Hydrogen ion (H⁺)