Question 1

What do you call a solution that resists changes in pH when small amounts of acid or base are added?

Accepted Answer

Buffer

Answer

Strong acid

Answer

Neutral solution

Answer

Weak base

Question 2

Which of the following is a characteristic of strong acids?

Accepted Answer

They completely dissociate in water.

Answer

They are always corrosive.

Answer

They have a pH of 7.

Answer

They do not conduct electricity.

Question 3

When a strong acid reacts with a strong base, what is the primary product formed?

Accepted Answer

Water and a salt

Answer

Hydrogen gas and oxygen

Answer

Sodium sulfate and carbon dioxide

Answer

Ammonium chloride and hydrogen

Question 4

What is the pH range of a basic solution?

Accepted Answer

Greater than 7

Answer

Between 7 and 14

Answer

Less than 7

Answer

Exactly 7

Question 5

Which of the following substances is considered a weak base?

Accepted Answer

Ammonia (NH₃)

Answer

Potassium hydroxide (KOH)

Answer

Hydrochloric acid (HCl)

Answer

Sodium hydroxide (NaOH)

Question 6

What effect does adding a buffer to a solution have when a small amount of acid is introduced?

Accepted Answer

It minimizes the change in pH.

Answer

It increases the pH drastically.

Answer

It has no effect on pH.

Answer

It turns the solution into a strong acid.

Question 7

What is the primary characteristic of a strong base?

Accepted Answer

It completely dissociates in water.

Answer

It can only neutralize weak acids.

Answer

It is a weak electrolyte.

Answer

It has a pH of 7.

Question 8

In an acid-base reaction, what type of substance donates protons?

Accepted Answer

Acid

Answer

Conjugate base

Answer

Base

Answer

Neutral substance

Question 9

Which buffer system is predominantly found in human blood?

Accepted Answer

Bicarbonate buffer system

Answer

Acetic acid buffer system

Answer

Ammonia buffer system

Answer

Phosphate buffer system

Question 10

What happens to the pH of a solution when a strong acid is added to it?

Accepted Answer

The pH decreases significantly.

Answer

The pH remains the same.

Answer

The pH fluctuates unpredictably.

Answer

The pH increases.

Question 11

What is formed when a strong acid reacts with a strong base?

Accepted Answer

Water and salt

Answer

Carbon dioxide and water

Answer

Ammonia and water

Answer

Hydrogen gas and salt

Question 12

Which of the following is a buffer solution?

Accepted Answer

A mixture of acetic acid and sodium acetate

Answer

A solution of hydrochloric acid

Answer

A solution of sodium chloride

Answer

Pure water

Question 13

What pH range typically indicates an acidic solution?

Accepted Answer

pH less than 7

Answer

pH equal to 14

Answer

pH greater than 7

Answer

pH equal to 7

Question 14

What is the expected result of mixing hydrochloric acid (HCl) with sodium hydroxide (NaOH)?

Accepted Answer

Neutralization to form NaCl and water

Answer

No reaction occurs

Answer

Formation of sodium chloride and hydrogen gas

Answer

Production of hydrogen gas

Question 15

Which of the following statements is true about strong acids?

Accepted Answer

They completely dissociate in water

Answer

They cannot conduct electricity

Answer

They partially dissociate in water

Answer

They are always neutral

Question 16

Which of the following describes a characteristic of bases?

Accepted Answer

They feel slippery to the touch

Answer

They are always viscous

Answer

They taste sour

Answer

They turn litmus paper red

Question 17

What is the primary role of a buffer solution in biological systems?

Accepted Answer

To maintain a stable pH

Answer

To provide nutrients to cells

Answer

To increase acidity when needed

Answer

To catalyze chemical reactions

Question 18

Which of the following is a characteristic of a buffer solution?

Accepted Answer

It resists changes in pH

Answer

It always has a pH of 7

Answer

It is made from strong acids and bases

Answer

It can only be made from acids

Question 19

What is the pH range of a strong acid?

Accepted Answer

Less than 7

Answer

More than 14

Answer

Between 7 and 14

Answer

Exactly 7

Question 20

What happens to the pH of a solution when a strong base is added to it?

Accepted Answer

The pH increases

Answer

The pH decreases

Answer

The pH stays the same

Answer

The pH becomes neutral

Question 21

Which of the following is a strong acid?

Accepted Answer

Sulfuric acid (H2SO4)

Answer

Acetic acid (CH3COOH)

Answer

Carbonic acid (H2CO3)

Answer

Hydrofluoric acid (HF)

Question 22

What is the purpose of a buffer solution in biological systems?

Accepted Answer

To maintain a stable pH

Answer

To neutralize all acids

Answer

To only dissolve solids

Answer

To increase acidity

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