1. A great scientist in search of a new chemical discovered a chemical X on this very day many many years ago. In his journal, he reported the following observations about chemical X.1.1 The chemical X is taken up by the plants and comes out of the leaves through the ___________.1.2 Planet _________ has maximum abundance of this chemical X in the Solar System.1.3 The planet appears mostly __________ in colour, due to the presence of this chemical X .1.4 Combustion of __________ gas produces only chemical X.1.5 Chemical X is commonly called as __________.



1.1 stomata 1.2 oxygen 1.3 blue 1.4 o2 1.5 oxygen