iGCSE Quiz on pH Scale and Indicators

What is the pH value of a neutral solution?

• Less than 7

• exactly 7

• Greater than 7

• Depends on the temperature

What is formed when an acid is neutralized by a base?

• Alkaline solution

• Water

• Salt

• Acidic solution

What does a pH value greater than 7 indicate?

• Alkaline solution

• Corrosive solution

• Neutral solution

• Acidic solution

What causes the acidity in a solution?

• High concentration of hydrogen ions

• High concentration of hydroxide ions

• Low concentration of hydrogen ions

• Presence of salts

Which of the following substances is likely to have a pH less than 7?

• Lemon juice

• Pure water

• Baking soda solution

• Soap solution

What does a high concentration of hydroxide ions (OH^-) in a solution indicate?

• The solution is neutral

• The solution is saturated

• The solution is acidic

• The solution is alkaline

Which instrument is commonly used to measure the pH of a solution?

• Hygrometer

• Barometer

• pH meter

• Thermometer

What is the typical pH range for acids?

• 0 to 6.9

• Above 14

• 7.1 to 14

• Exactly 7

Which solution releases H+ in solution?

• Base
• Acid
• Buffer
• Water

Tags

NGSS.MS-PS1-2

A solution with a pH of 3.6 would be...

• Acid
• Base
• Neutral
• Acid and Base