Question

in certain experiment a gas jar B containing reddish brown gas , nitrogen dioxide is inverted over another jar A containing colourless hydrogen gas as shown. Now the lid separating the jars is removed after some times what are the constituent in jar A​

Answer 1

$\rm\huge\underline{Answer}$

the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.