Answer the following questions in brief: (a) Why is chemistry known as an experimental science? (b) Why are most apparatus made of glass ?
(a) Chemistry is known as experimental science as an experiment is performed under controlled conditions in an activity and we observe a natural or an artificially created phenomenon.
(b) Most of the laboratory apparatus is made of glass because :
- glass is easy to clean.
- Glass is transparent material and we can see through it clearly.
- It does not react with most of the chemicals used in experiments.
- Glass withstands high temperatures.
- Pyrex glass or borosil glass is a special type of glass which hardly expands on heating. Such glasses do not break even at high temperatures.