A dilute solution of sulphuric acid is electrolysed using a current of 0 . 10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced at STP is cm 3 . (Nearest integer) [Given : Faraday constant F = 96500 Cmol - 1 at STP , molar volume of an ideal gas is 22 . 7 L mol - 1 ]

Step-by-step solution

At anode 2 H 2 O → O 2 g + 4 H + + 4 e - At cathode 2 H + + 2 e - → H 2 g Now number of gm eq. = i × t 96500 = 0 . 1 × 2 × 60 × 60 96500 = 0 . 00746 V O 2 = 0 . 00746 4 × 22 . 7 = 0 . 0423 V H 2 = 0 . 00746 2 × 22 . 7 = 0 . 0846 V Total ≈ 127 ml or cc