Question

15. Four moles of electrons were transferred from anode to cathode in an experiment on electrolysis of water. The total volume of the two gases (dry and at STP) produced will be approximately in litres) (A) 22.4 (B) 44.8 (C) 67.2 (D) 89.4

JEE/Engineering Exams

Chemistry

Solution

4.0 (1 ratings)

At Anode : ( 40 H^{-} rightarrow 2 H_{2} O+O_{2}+4 e^{-} ) At cathode ( : 40 H^{+} 4 e^{-} rightarrow 2 H_{2} ) If number of moles of electron transferred=4 Number of moles of oxyzen liberated=1 Number of moles of hydrogen liberated=2 So total moles of gases ( =3 ) Volume of gases ( =3 times 22.4=67.2 )litre Hence (c) is the correct answer.