SATHEE: Redox Reactions And Electrochemistry Ques 715

Redox Reactions And Electrochemistry Ques 715

Question: Acidulated water is electrolysed by 1 A current for 16 min and 5s using inert electrodes, The volume of gases liberated at STP will be

Options:

A) 22.4 mL

B) 112 mL

C) 168 mL

D) 336 mL

Show Answer

Answer:

Correct Answer: C

Solution:

[c] At cathode $H_{2} O + 2 e^{-} \overset{,}{\to}, H_{2} + 2 O H^{⊙ -}$ At Anode $H_{2} O \overset{,}{\to} \frac{1}{2}, O_{2} + 2 H^{\oplus} + 2 e^{-}$ i.e., on passing 2 mol of current, 1 mol $H_{2} (g)$ and $\frac{1}{2}, m o l O_{2} (g)$ is liberated at cathode and anode respectively. From $Q = i t$ $=, 1 \times (16 \times 60 + 5) = 965 C$ the amount of gases liberated by passing 965 C of electricity $= \frac{1.5 \times 965}{2 \times 96500} m o l$ = 0.0075 mol and value of gases liberated $= 0.0075 \times 22400, m L = 168, m L$

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Redox Reactions And Electrochemistry Ques 715

Question: Acidulated water is electrolysed by 1 A current for 16 min and 5s using inert electrodes, The volume of gases liberated at STP will be

Options:

Answer:

Solution:

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