Home > Science > Chemical and material behaviour > Acids, bases and metals
What does this hazard symbol mean?
Which of these acids is most likely to be dangerous?
Which statement about bases is true?
they are all alkalis
they can neutralise acids
they are all soluble
Which statement about alkalis is true?
they are all bases
they cannot neutralise acids
they are all insoluble
What happens to litmus paper in acidic solutions?
red litmus turns blue
blue litmus turns red
yellow litmus turns green
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 7.5 - what does this mean?
it is weakly acidic
it is weakly alkaline
A liquid has a pH of 1 - what does this mean?
it must be sodium hydroxide solution
it is strongly acidic
What products are formed when a metal oxide reacts with an acid?
a salt only
a salt and water
a salt, water and carbon dioxide
What products are formed when a metal carbonate reacts with an acid?
Farmers use lime to neutralise their soils. What sort of substance is lime?
a sharp tasting drink
Which acid could be used to make ammonium nitrate (a type of fertiliser)?
Which salt is made when copper oxide and sulfuric acid react together?
Which gas is produced when magnesium reacts with hydrochloric acid?