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