Question

In the electrolysis of water:(i) Name the gas collected at the cathode and anode respectively.(ii) Why the volume of one gas, collected at one electrode is double than that at the other? Name this gas.(iii) How will you test the evolved gases ?​

Answer 1

Answer:

Explanation:

electrolysis of water gives h2 at cathode and o2 at anode

let me write the equations of that

reaction at cathode

2h2o+2e = h2+2oh-

reaction at anode

2h2o = 4h+ +o2+4e

if you see equivalent of o2 is double of equivalent of h2 therefore volumes are double

these gases presence can be tested by flame test