pH scale

How many level are there in pH scale ?

• 1

• 7

• 11

• 14

What happens to litmus paper in acidic solutions?

• Red litmus turns blue

• Blue litmus turns red

• Yellow litmus turns green

Tags

NGSS.MS-PS1-2

Universal indicator solution is usually green to begin with. What does this mean?

• It is acidic

• It is alkaline

• It is neutral

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

Which acid could be used to make ammonium nitrate (a type of fertiliser)?

• Hydrochloric acid

• Sulfuric acid

• Nitric acid

Tags

NGSS.MS-PS1-2

Which salt is made when copper oxide and sulfuric acid react together?

• Copper sulfate

• Copper sulfuroxide

• Copper sulfide

Tags

NGSS.HS-PS1-2

What is the result of neutralisation reaction

• salt, water

• alkaline, acid

• salt, alkaline

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Our stomach contain ____________ to help us digest food

• strong alkaline

• salspecial salt and water

• strong acid

Tags

NGSS.MS-LS1-7

pH of soap is 8, soap is ________

• strongly acidic

• neutral

• weakly alkaline