Understanding pH and Oxides

What is the pH of a neutral substance?

• Less than 7

• Equal to 7

• More than 7

Which ion is responsible for a solution being alkaline?

• Hydrogen ion (H+)

• Hydroxide ion (OH-)

• Chloride ion (Cl-)

What type of bonding do acids have?

• Ionic bonding

• Covalent bonding

• Metallic bonding

What happens to the concentration of a solution when it is mixed with water?

• It increases

• It decreases

• It remains the same

What is formed when a metal reacts with oxygen?

• Acid

• Metal oxide

• Non-metal oxide

What is the pH range of acids?

• Less than 7

• Equal to 7

• More than 7

What type of solution is formed by soluble non-metal oxides?

• Alkaline solution

• Acidic solution

• Neutral solution

What is the nature of the solution formed by soluble metal oxides?

• Acidic

• Alkaline

• Neutral

Which ion is present in all acids?

• Hydroxide ion (OH-)

• Hydrogen ion (H+)

• Sodium ion (Na+)

What is the effect on pH if an oxide does not dissolve in water?

• It becomes acidic

• It becomes alkaline

• It has no effect