Acids and Bases 1
What taste is usually associated with acids like lemon juice?
A) Sweet
B) Bitter
C) Sour
D) Salty
C) Sour
What is the pH value of a neutral substance?
A) 0
B) 3
C) 7
D) 10
C) 7
What two products are always formed when an acid reacts with a base?
A) Salt and oil
B) Salt and water
C) Water and sugar
D) Gas and metal
B) Salt and water
What is electrolysis?
A) The heating of metals
B) The separation of ions using magnets
C) The splitting of compounds using electricity
D) The cooling of elements
C) The splitting of compounds using electricity
What is electroplating?
A) Removing metal using electricity
B) Coating metal with another metal
C) Dissolving metal in acid
D) Freezing metal quickly
B) Coating metal with another metal
What do bases do to acids?
A) Burn them
B) Turn them sweet
C) Neutralize them
D) Evaporate them
C) Neutralize them
What tool is used to measure how acidic a substance is?
A) Thermometer
B) Indicator paper
C) Bunsen burner
D) Graduated cylinder
B) Indicator paper
What is the reaction between an acid and a base called?
A) Explosion
B) Condensation
C) Neutralization
D) Dissolution
C) Neutralization
What particles must a compound contain for electrolysis to work?
A) Neutrons
B) Molecules
C) Atoms
D) Ions
D) Ions
What is the charge of a hydrogen ion in water?
A) Negative
B) Neutral
C) Positive
D) Zero
C) Positive
Which of the following is a weak acid?
A) Hydrochloric acid
B) Lemon juice
C) Sulfuric acid
D) Nitric acid
B) Lemon juice
What part of the body produces a strong acid to kill germs?
A) Liver
B) Brain
C) Stomach
D) Lungs
C) Stomach
What do alkalis release in water?
A) Hydrogen gas
B) Salt crystals
C) Hydroxide ions (OH–)
D) Carbon dioxide
C) Hydroxide ions (OH–)
What is the positive electrode in electrolysis called?
A) Cathode
B) Diode
C) Anode
D) Conductor
C) Anode
What is the role of the electrolyte in electrolysis?
A) To cool the electrodes
B) To carry electrons
C) To allow ion movement
D) To prevent reaction
C) To allow ion movement
What ion do acids release in water?
A) Hydroxide ions
B) Sodium ions
C) Hydrogen ions
D) Oxygen ions
C) Hydrogen ions
What are bases that dissolve in water called?
A) Acids
B) Neutralizers
C) Alkalis
D) Salts
C) Alkalis
What do you observe when an acid reacts with a metal carbonate?
A) Change in smell
B) Bubbling due to carbon dioxide
C) Glowing light
D) Production of sugar
B) Bubbling due to carbon dioxide
Why does pure water conduct electricity slightly?
A) It has salt
B) Some water molecules form ions
C) It contains metal particles
D) It is acidic
B) Some water molecules form ions
What happens at the cathode during electrolysis of water?
A) Oxygen is released
B) Hydrogen ions gain electrons
C) Hydroxide ions gain electrons
D) No reaction occurs
B) Hydrogen ions gain electrons
Why are strong alkalis considered dangerous?
A) They are cold
B) They are explosive
C) They are as corrosive as acids
D) They don’t mix with water
C) They are as corrosive as acids
What is the role of sodium bicarbonate in baking powder?
A) Adds sweetness
B) Absorbs water
C) Acts as the base that reacts to form carbon dioxide
D) Keeps the batter cold
C) Acts as the base that reacts to form carbon dioxide
Which two substances are formed when acids react with metals?
A) Salt and hydrogen gas
B) Oxygen and salt
C) Salt and water
D) Metal and base
A) Salt and hydrogen gas
During silver electroplating, what happens at the anode?
A) Silver ions are created
B) Silver is deposited
C) Silver is removed from the cathode
D) Hydrogen bubbles form
A) Silver ions are created
How does current help in electrolysis?
A) It heats the solution
B) It pushes ions to electrodes
C) It reacts with metal
D) It prevents bubbles
B) It pushes ions to electrodes