Acid and Base Test

How does the pH scale affect biological systems?

• It has no effect on biological processes.

• It only affects plant growth.

• Many biological processes are pH-sensitive, and deviations from optimal pH can affect enzyme activity and metabolic functions.

• It only affects the color of substances.

What is the pH range of acidic solutions?

• 0 to 5

• 0 to 7

• 5 to 10

• 7 to 14

What is the difference between a strong acid and a weak acid?

• A strong acid partially dissociates in water, while a weak acid completely dissociates.

• A strong acid has a higher pH than a weak acid.

• A strong acid completely dissociates in water, while a weak acid only partially dissociates.

• A strong acid is less corrosive than a weak acid.

What is the pH scale?

• A numerical scale ranging from 0 to 14 that measures the acidity or alkalinity of a solution.

• A scale that measures the temperature of a solution.

• A scale that indicates the density of a liquid.

• A scale used to measure the viscosity of a solution.

What is an example of a food that is acidic?

• Orange juice

• Rice

• Potato

• Chicken

What is an example of a weak acid?

• Hydrochloric acid

• Sulfuric acid

• Acetic acid, which is found in vinegar

• Nitric acid

What is the pH range of neutral solutions?

• 5

• 7

• 9

• 10

What is the effect of acids on indicators?

• Acids can change the color of pH indicators, helping to determine the acidity of a solution.

• Acids have no effect on indicators and do not change their color.

• Acids make indicators less effective in determining pH levels.

• Acids can only change the color of universal indicators, not pH indicators.

What is an example of a common acid?

• Vinegar

• Baking Soda

• Salt

• Sugar

What ions do acids release in water?

• Hydrogen ions (H⁺)

• Sodium ions (Na⁺)

• Chloride ions (Cl^-)

• Calcium ions (Ca²⁺)