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MCQ on Buffer Solution
Here are some Buffer Solution MCQs made for you to check your knowledge.
Explore the properties and applications of buffer solutions, including their role in biological systems, laboratory experiments, and industrial processes.
Answering these questions will help you grasp the principles behind buffer solutions and their importance in maintaining pH stability.
Ready to test your knowledge of buffer solutions? Let’s dive into the MCQs below!
MCQ on Buffer Solution
_____ keep solutions at a steady pH by combining with excess hydrogen or hydroxide ions
Salts
mixtures
Buffers
None of these
Buffers
The most common buffers in the human body are _____ ion
hydrogen
sodium
Carbonate
Bicarbonate
Bicarbonate
_____ ion carries carbon dioxide through the bloodstream to the lungs to be exhaled
hydrogen
Sodium
Bicarbonate
Carbonate
Bicarbonate
A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. It typically consists of a weak acid and its conjugate base, or a weak base and its conjugate acid, maintaining the pH within a certain range.
Bicarbonate ion carries _____ through the bloodstream to the lungs to be exhaled
oxygen
carbon dioxide
Nitrogen
chlorine
carbon dioxide
If blood becomes too acidic, such condition is called?
Acidosis
necrosis
Apoptosis
None of these
Acidosis
If the blood becomes too basic. Such situation is called?
Acidosis
necrosis
alkalosis
None of these
alkalosis
What defines a buffer solution?
High concentration solute
pH resistance
Acid and base mix
Only water
pH resistance
Which is NOT a common biological buffer?
Carbonic acid
Phosphoric acid
Acetic acid
Hydrochloric acid
Hydrochloric acid
What role does the conjugate base play?
Neutralize added acid
Reacts with base
Provides protons
Accepts protons
Reacts with base
What’s NOT a way to prepare a buffer?
Acid with base
Strong acid mix
Partial neutralization
Weak acid with base
Strong acid mix
What’s pH mostly influenced by?
Temperature
Ionic strength
Acid concentration
Catalyst presence
Acid concentration
What can disrupt a buffer?
Dilution
Added acid/base
Temperature
All of above
All of above
What’s Henderson-Hasselbalch for?
pH calculation
Solute concentration
Solubility prediction
Reaction rate
pH calculation
What’s buffer capacity?
pH stability
Lower concentration
Max acid/base
Volume relation
Max acid/base
How does buffer resist pH change?
Neutralization
Water production
Acid increase
Heat release
Neutralization
True about buffer solutions?
Fixed pH
Narrow range
Not in biology
Strong acid mix
Narrow range
MCQ on Types of Buffer Solutions
What defines a phosphate buffer?
Phosphoric acid
Acetic acid
Hydrochloric acid
Sulfuric acid
Phosphoric acid
Which buffer system is commonly found in blood?
Carbonic acid/bicarbonate
Acetic acid/acetate
Phosphoric acid/phosphate
Hydrochloric acid/chloride
Carbonic acid/bicarbonate
What is a zwitterion buffer?
Amino acids
Carbohydrates
Lipids
Nucleic acids
Amino acids
Which buffer system is crucial in maintaining pH in intracellular fluid?
Phosphate buffer
Hemoglobin buffer
Protein buffer
Carbonic acid/bicarbonate buffer
Protein buffer
Which of the following is NOT a type of buffer solution?
Biological buffer
Synthetic buffer
Chemical buffer
Universal buffer
Universal buffer
What is a good example of a biological buffer system?
Sodium chloride
Ammonium hydroxide
Tris buffer
Hemoglobin buffer
Hemoglobin buffer
What does a “good” buffer system typically have?
High concentration of acid
Low concentration of base
Weak acid and its conjugate base
Strong acid and its conjugate base
Weak acid and its conjugate base
Which buffer is commonly used in molecular biology laboratories?
TRIS buffer
Sodium hydroxide
Hydrochloric acid
Nitric acid
TRIS buffer
What is a major function of biological buffers?
Regulate temperature
Maintain constant pH
Increase solubility
Accelerate chemical reactions
Maintain constant pH
Which buffer system is often used in biochemical experiments due to its stability over a wide pH range?
Phosphate buffer
Hemoglobin buffer
Citrate buffer
Acetate buffer
Citrate buffer
MCQ on Acidic buffers and Alkaline buffers
Which of the following is characteristic of an acidic buffer?
High pH
Low pH
Neutral pH
Varying pH
Low pH
What is the primary component of an acidic buffer system?
Weak acid and its conjugate base
Strong acid and its conjugate base
Weak base and its conjugate acid
Strong base and its conjugate acid
Weak acid and its conjugate base
Which acid is commonly used in acidic buffer solutions?
Hydrochloric acid
Sulfuric acid
Acetic acid
Nitric acid
Acetic acid
What is the pH range of an acidic buffer solution?
0-7
7-14
0-2
2-7
2-7
Which of the following is NOT a characteristic of alkaline buffers?
High pH
Low pH
Basic pH
Alkaline pH
Low pH
What is the primary component of an alkaline buffer system?
Weak acid and its conjugate base
Strong acid and its conjugate base
Weak base and its conjugate acid
Strong base and its conjugate acid
Weak base and its conjugate acid
Which base is commonly used in alkaline buffer solutions?
Sodium hydroxide
Ammonium hydroxide
Potassium hydroxide
Calcium hydroxide
Ammonium hydroxide
What is the pH range of an alkaline buffer solution?
0-7
7-14
0-2
2-7
7-14
How does an acidic buffer resist changes in pH?
By accepting protons
By donating protons
By accepting hydroxide ions
By donating hydroxide ions
By donating protons
How does an alkaline buffer resist changes in pH?
By accepting protons
By donating protons
By accepting hydroxide ions
By donating hydroxide ions
By accepting protons
MCQ on Buffer Action
What’s buffer action’s main purpose?
Neutralize changes
Maintain pH
Increase ionic strength
Produce more ions
Maintain pH
How does a buffer resist pH changes?
Produce ions
Absorb excess
Maintain equilibrium
Increase temperature
Maintain equilibrium
How does buffer react to added acid?
Donate protons
Accept protons
Dissociate components
Release water
Donate protons
Which of the following is NOT a characteristic of effective buffer action?
High buffer capacity
Wide pH range of effectiveness
Presence of strong acid and strong base
Rapid response to changes in pH
Presence of strong acid and strong bas
What happens to the pH of a buffer solution when a small amount of strong acid is added?
pH decreases slightly
pH increases slightly
pH remains relatively unchanged
pH changes dramatically
pH remains relatively unchanged
Which factor does NOT affect the effectiveness of a buffer solution?
Temperature
Ionic strength
Concentration of the buffer components
Presence of catalysts
Presence of catalysts
What is the primary mechanism by which a buffer resists changes in pH?
Le Chatelier’s Principle
Henderson-Hasselbalch equation
Buffer capacity
Equilibrium shift
Equilibrium shift
Which of the following is NOT a common application of buffer solutions?
Biological experiments
Pharmaceutical formulations
Household cleaning products
Automotive lubricants
Automotive lubricants
How does a buffer solution behave when a small amount of strong base is added?
The buffer accepts hydroxide ions to neutralize the added base
The buffer donates hydroxide ions to neutralize the added base
The buffer dissociates completely
The buffer releases protons
The buffer accepts hydroxide ions to neutralize the added base
Which of the following statements is true regarding buffer action?
Buffer action is most effective at extreme pH values
Buffers are only effective in solutions with low ionic strength
Buffer action relies on the presence of strong acids and bases
Buffers can resist changes in pH when limited amounts of acid or base are added
Buffers can resist changes in pH when limited amounts of acid or base are added
MCQ on Buffer Solution Preparation
How is a buffer made?
Acid and base
Mixing weak components
Boiling components
Acid alone
Mixing weak components
Purpose of titration?
pH measurement
Adjusting pH
Determining volume
Neutralizing
Determining volume
Common buffer prep method?
Mixing directly
Titration
Dilution
Heating
Mixing directly
Buffer solution’s main feature?
High pH
Low pH
pH stability
Changing pH
pH stability
What does a buffer resist?
Temperature
pH changes
Pressure
Concentration
pH changes
Buffer component interaction?
Reacting equally
Dynamic equilibrium
Absorption
Dissociation
Dynamic equilibrium
Ideal buffer component type?
Strong acid
Weak acid
Strong base
Weak base
Weak acid
Buffer preparation measure?
Direct mixing
Dilution
Heating
Cooling
Dilution
Buffer solution’s goal?
pH increase
pH decrease
pH stability
pH variation
pH stability
Buffer solution method?
Heating
Titration
Mixing
Concentration
Mixing
MCQ on Preparation of Acid/base Buffer
How is an acid buffer prepared?
Acid & Base
Acid & Salt
Acid & Water
Acid & Acid
Acid & Salt
Base buffer preparation involves:
Acid & Base
Base & Salt
Base & Water
Base & Acid
Base & Salt
What’s crucial for an acid buffer?
High pH
Low pH
Acid & Base ratio
Acid concentration
Acid & Base ratio
Key to base buffer’s effectiveness?
High pH
Low pH
Base & Acid ratio
Base concentration
Base & Acid ratio
Acid buffer components maintain:
pH Stability
pH Increase
pH Decrease
pH Variation
pH Stability
What’s the primary purpose of a base buffer?
pH Increase
pH Decrease
pH Stability
pH Variation
pH Stability
Acid buffer preparation involves combining:
Strong Acid & Strong Base
Weak Acid & Strong Base
Weak Acid & Weak Base
Strong Acid & Weak Base
Weak Acid & Strong Base
Base buffer preparation requires:
Weak Base & Strong Acid
Strong Base & Weak Acid
Weak Base & Weak Acid
Strong Base & Strong Acid
Strong Base & Weak Acid
What’s vital for acid buffer’s action?
Absorbing ions
Releasing ions
Neutralizing ions
Maintaining equilibrium
Maintaining equilibrium
Base buffer’s primary function is to:
Release ions
Absorb ions
Neutralize ions
Maintain pH balance
Maintain pH balance
MCQ on Buffer Solution Problems
What’s a common issue with buffer solutions?
pH Variability
pH Stability
Ionic Strength
Temperature Sensitivity
pH Variability
Buffer problem often arises from:
Low Concentration
High Concentration
Incorrect Ratio
Temperature Change
Incorrect Ratio
What can disrupt buffer action?
Dilution
Concentration
Ratio Change
Temperature
Dilution
Buffer’s inability to resist pH changes due to:
Low Capacity
High Capacity
Incorrect Components
Accurate Preparation
Incorrect Components
Buffer solution with pH changes rapidly lacks:
Low pH
High pH
pH Stability
pH Variability
pH Stability
What’s necessary for effective buffer action?
pH Shift
Ionic Strength
Equilibrium Maintenance
Temperature Variation
Equilibrium Maintenance
Common problem in preparing buffers is:
Mixing
Titration
Heating
Cooling
Mixing
Buffer’s pH changes significantly due to:
Strong Acid/Base
Weak Acid/Base
Concentration
Dilution
Strong Acid/Base
How to overcome buffer problems?
Increase Concentration
Maintain Ratio
Decrease Ionic Strength
Change Components
Maintain Ratio
Buffer’s effectiveness decreases with:
Increased pH Stability
Increased pH Variability
Accurate Preparation
Equilibrium Maintenance
Increased pH Variability
MCQ on Uses of Buffer Solutions
Common buffer use in labs?
pH Control
Temperature Control
Ionic Control
Concentration Control
pH Control
Buffer solution often employed in:
Cooking
Cleaning
Biology
Gardening
Biology
Buffer’s role in biochemical assays?
pH Stabilization
pH Variation
pH Increase
pH Decrease
pH Stabilization
Buffer’s application in pharmaceuticals?
pH Adjustment
Color Enhancement
Odor Elimination
Texture Improvement
pH Adjustment
Buffer’s utility in DNA research?
Maintain pH
Increase pH
Decrease pH
Neutralize pH
Maintain pH
Buffer’s significance in enzyme studies?
Maintain Activity
Reduce Activity
Increase Activity
Neutralize Activity
Maintain Activity
Buffer’s use in fermentation processes?
pH Control
Temperature Control
Pressure Control
Volume Control
pH Control
Buffer’s function in analytical chemistry?
Precipitation Control
pH Control
Reaction Control
Solubility Control
pH Control
Buffer’s role in food industry?
Flavor Enhancement
pH Regulation
Texture Modification
Color Stabilization
pH Regulation
Buffer’s importance in cosmetics?
pH Balance
Color Enhancement
Fragrance Enhancement
Texture Improvement
pH Balance
MCQ on Examples of Buffers
What is a common example of a biological buffer found in blood?
Carbonic Acid
Citric Acid
Lactic Acid
Hydrochloric Acid
Carbonic Acid
Which buffer system is present in saliva, maintaining oral pH?
Phosphate Buffer
Acetate Buffer
Carbonic Acid Buffer
Citrate Buffer
Carbonic Acid Buffer
What buffer system is prevalent in intracellular fluid, crucial for cellular pH regulation?
Phosphate Buffer
Bicarbonate Buffer
Tris Buffer
Acetate Buffer
Bicarbonate Buffer
Which buffer system is commonly used in molecular biology experiments?
Tris Buffer
Phosphate Buffer
Acetate Buffer
Citrate Buffer
Tris Buffer
What buffer is often employed in biochemistry laboratories for protein studies?
Tris Buffer
Phosphate Buffer
Acetate Buffer
Citrate Buffer
Phosphate Buffer
Which buffer system is utilized in cell culture media to maintain physiological pH?
Phosphate Buffer
Bicarbonate Buffer
Tris Buffer
Acetate Buffer
Bicarbonate Buffer
What is a common buffer used in HPLC (High-Performance Liquid Chromatography) separations?
Phosphate Buffer
Bicarbonate Buffer
Acetate Buffer
Tris Buffer
Phosphate Buffer
Which buffer system is present in the human body to regulate urinary pH?
Bicarbonate Buffer
Phosphate Buffer
Citrate Buffer
Acetate Buffer
Bicarbonate Buffer
What buffer is commonly used in electrophoresis techniques for DNA and RNA analysis?
Tris Buffer
Phosphate Buffer
Acetate Buffer
Bicarbonate Buffer
Tris Buffer
Which buffer system is essential for maintaining the pH of aqueous solutions used in clinical chemistry?
Phosphate Buffer
Bicarbonate Buffer
Tris Buffer
Citrate Buffer
Phosphate Buffer
MCQ on Buffer Capacity
What does buffer capacity measure?
pH range
Ionic strength
Buffer’s effectiveness
Acid concentration
Buffer’s effectiveness
What does a higher buffer capacity indicate?
Greater pH stability
Lower pH stability
Higher ionic strength
Lower acid concentration
Greater pH stability
Buffer capacity is influenced by:
Temperature
Concentration
Ratio
All of the above
All of the above
How does dilution affect buffer capacity?
Increases it
Decreases it
Does not affect
Reverses it
Decreases it
What type of buffer has higher capacity?
Weak acid/strong base
Strong acid/weak base
Strong acid/strong base
Weak acid/weak base
Weak acid/weak base
Buffer capacity is highest at:
Low pH
High pH
Mid-range pH
Neutral pH
Mid-range pH
How does increasing concentration affect buffer capacity?
Increases it
Decreases it
No effect
Inverts it
Increases it
What happens to buffer capacity with extreme pH values?
Increases
Decreases
Remains constant
Becomes zero
Decreases
Buffer capacity depends on:
pH range
Buffer type
Buffer volume
All of the above
All of the above
Buffer capacity determines:
pH change
pH range
pH stability
pH variability
pH stability
