the amount of one gas is doubled. of the amount of other gas on electrolysis of water
Answers
This is most likely the electrolysis of water. H2O means you have two atoms of hydrogen for one of oxygen. These atoms form the gazes : which do not remain monoatomic but are found as H2 and O2 (check the octet rule). Each time you produce two molecules of hydrogen (H2) you get also one molecule of oxygen (O2). As gazes they follow the rule PV=nRT. Pressure multiplied by Volume equals the number of moles (molecules if you prefer) multiple by the gaz constant (R) and temperature (expressed in degree Kelvin). Since pressure and temperature are the same in both test tubes, the influence of volume is directly proportional to the amount of mole(cules). producing twice as many molecules of hydrogen then oxygen. The volume is double in the hydrogen test tube.