Science quiz

What happens to litmus paper in acidic solutions?

• Red litmus turns blue

• Blue litmus turns red

• Yellow litmus turns green

A liquid has a pH of 8. What does this mean?

• it is neutral

• It is weakly acidic

• it is weakly akline

A liquid has a pH of 1. What does this mean?

• It must be sodium hydroxide solution

• It is strongly acidic

• It is weakly akline

What is the result of neutralisation reaction

• salt, water

• alkaline, acid

• salt, alkaline

Our stomach contain ____________ to help us digest food

• strong alkaline

• salspecial salt and water

• strong acid

The pH scale ranges from:

• 0-14

• 1-20

• 1-7

• 1-5

A(n) ____ is a substance with a pH less than seven.

• acid

• base

• buffer

• alkaline

What is the only substance with a neutral pH of seven?

• Orange Juice

• Blood

• Pure water

• Milk

A pH of three is MORE acidic than a pH of five.

• True

• False

On the pH scale, higher numbers indicate _____.

• acids

• bases