Question

while using observation as a method which prequation you will follow suggest any four

Answer 1

While ovserving sth after performing the experiment should give hand in nose preventing poisonous gas to enter.
Closing the eveys with glass wares so that thre will be no irritation in eyes .
Should not touch anything they may be poisonous.
.
We must not taste anything unknown even though organic.

Answer 2

While observing sth we should be alert so that the gases wouldnot enter our nose and eyes.