PH Indicators

What color does universal indicator turn in neutral solutions?

• Red

• Yellow

• Green

• Blue

What does a pH level of <7 indicate?

• An acidic substance

• A basic substance

• A neutral substance

• A strong acid

What color does phenolphthalein turn in alkaline solutions?

• Purple

• Red

• Pink

• Colorless

What color does blue litmus paper turn in acidic solutions?

• Blue

• Red

• Green

• Yellow

What colour would universal indicator turn when added to soap?

• Dark green

• Purple

• Yellow

• Red

What colour would universal indicator turn when added to a solution of pH 5?

• Orange

• Green

• Red

• Blue

What would a pH of 8 indicate about a substance?

• Weak alkali

• Strong alkali

• Neutral

• Weak acid

Which of these substances would represent the most acidic substance?

• pH 2

• pH 6

• pH 10

• pH 14

Which of these substances would turn methyl orange red?

• HNO3

• NaOH

• Ca(OH)2

• NH3

Which of these would cause a colour change for blue litmus paper?

• Lemon juice

• Pure water

• Soap

• Ammonia