chemistry

1.

What does this hazard symbol mean?

corrosive

irritant

harmful

2.

Which of these acids is most likely to be dangerous?

citric acid

carbonic acid

hydrochloric acid

3.

Which statement about bases is true?

they are all alkalis

they can neutralise acids

they are all soluble

4.

Which statement about alkalis is true?

they are all bases

they cannot neutralise acids

they are all insoluble

5.

What happens to litmus paper in acidic solutions?

red litmus turns blue

blue litmus turns red

yellow litmus turns green

6.

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

it is acidic

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