Answer:
(i) Take a plastic vessel.
Drill two holes at its bottom and set rubber stoppers in these
holes,
(ii) Insert carbon electrodes in pxygen these rubber
stoppers and connect these electrodes to a 6 volt battery and a switch.
(iii) Fill the vessel with water such that the electrodes
are immersed. Add a few drops of dilute sulphuric acid to the water in the
vessel.
(iv) Take two graduated test tubes filled with water and
invert them over the two carbon electrodes.
(v) Switch on the current.
(iv) After sometime, you will observe the formation of
bubbles at both the electrodes. These bubbles displace water in the graduated
tubes.
(vii) Once
the test tubes are filled with the respective gases, remove them carefully.
(viii) Test these gases one by one by bringing a burning
splinter of wood close to the mouth of test tubes.
When the glowing splinter of wood is brought close to the
mouth of one test tube, it relights and when it is brought close to the mouth
of other test tube, the gas burns with a pop. Oxygen is the only common gas
that relights the splinter and hydrogen gas burns with a pop.
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