Science Quiz on Acids and Indicators

Which of the following tastes sour?

• Soap

• Lemon juice

• Salt water

• Sugar

Which of the following turns red litmus paper blue?

• Vinegar

• Lemon juice

• Soap water

• Orange juice

What is the common salt we use in food?

• Sodium hydroxide

• Sodium chloride

• Calcium carbonate

• Potassium nitrate

What color does turmeric turn in a basic solution like soap water?

• Yellow

• Red or brown

• Green

• Blue

Which of the following is a natural indicator?

• Plastic

• Turmeric

• Glass

• Metal