Question

Describe an experiment to show electrolytic decomposition of water

Answer 1

Take a glass beaker fix two electrodes. The positive electrode acts as anode &negative electrode act as cathode. Fill 1/3 of beaker with water. Take two test tubes. Insert on electrodes. Observe the level of water in the test tubes. Connect the electrodes to a battery. Pass the electricity for a period of time. Later switch off the current and observe the level of water in test tubes. The level of water in the test tubes is decreased. The free space in the test tubes is filled with H2 & O2gases. Oxygen gas is evolved at anode and hydrogen gas released at cathode. 


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Answer 2

ANSWER:

TAKE TWO IRON PLATES CONNECT THE HEADS OF THE PLATES WITH COPPEN WIRES TO JOIN THEM TO A BATTERY THE TWO IRON PLATES ARE CALLED ELECTRODES. THE ELECTRODES CONNECT TO THE POSITIVE TERMINAL OF THE BATTERY BECOMES POSITIVELY CHARGED

AND IS CALLED QNODE. THE ELECTRODE CONNECTED TO THE NEGITIVE TERMINAL OF THE BATTERY GETS NEGITIVELY CHARGED AND IS KNOWN AS CATHODE. NOW TAKE SOME WATER IN A BEAKER AND ADD A THEASPOONFUL OF SALT TO IT. IMMERSE THE ELECTRODES IN THIS SOLUTION. WHEN THE SWITCH IN ON POSITION,THE BULB GLOWS,SHOWING THAT THE CIRCUIT IS COMPLETE AND CURRENT PASSES THROUGH THE SOLUTION.