0.1F of electricity is passed through aqueous solution of copper sulphate using Pt electrodes. If 3.18 grams of copper is deposited at cathode, the volume of oxygen liberated (at STP) at anode will be (Atomic weight of copper = 63.6 ; Atomic weight of oxygen = 16)
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a
560 ml
b
224 ml
c
672 ml
d
336 ml
answer is A.
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Detailed Solution
Applying Faraday's II lawWO2WCu=EO2ECu; ECu=63.62 ; EO2=162; WO23.18=831.8; WO2=0.8 grams; VO2 at STP=0.832×22.4 litres=0.56 litres=560 ml