`{:(Content,Resistance ,"Volume of gas produced"),(,(at same T & P),),(Cell-1 CuSO_(4)(aq),10Omega,"at anode is" V_(1)),(Cell-2NaCI(aq),2Omega,"at anode is"V_(2)),(Cell-3 ZnSO_(4)(aq),6Omega,"at cathode is"V_(3)):}`

Answer

`2:3:1`

Explanation

`{:(,Cell-1,Cell-2,Cell-3),("Product",O_(2),CI_(2),H_(2)),("n-Factor",4,2,2),("Equivalent from the",1,3//4,1//4),("gives resistance",,,),(Mol,1//4,3//8,1//8),("Volume ratio",2,3,1):}`