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NEET CHEMISTRYMedium

During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol0.10 \text{ mol} of chlorine gas using a current of 3 amperes3 \text{ amperes} is

A

55 minutes

B

110 minutes

C

220 minutes

D

330 minutes

Step-by-Step Solution

The balanced chemical equation for the oxidation of chloride ions to chlorine gas at the anode is: 2ClCl2+2e2\text{Cl}^- \rightarrow \text{Cl}_2 + 2\text{e}^- This indicates that the formation of 1 mole1 \text{ mole} of Cl2\text{Cl}_2 gas requires the passage of 2 moles2 \text{ moles} of electrons, which corresponds to a charge of 2 Faradays2 \text{ Faradays} (2×96500 C2 \times 96500 \text{ C}). For producing 0.10 mol0.10 \text{ mol} of Cl2\text{Cl}_2, the required charge (QQ) is: Q=0.10×2×96500 C=19300 CQ = 0.10 \times 2 \times 96500 \text{ C} = 19300 \text{ C} We know that charge Q=I×tQ = I \times t, where II is the current and tt is the time in seconds. Given current I=3 AI = 3 \text{ A}, t=QI=193003 s=6433.33 st = \frac{Q}{I} = \frac{19300}{3} \text{ s} = 6433.33 \text{ s} To convert the time into minutes, we divide by 6060: t (in minutes)=6433.3360107.22 minutest \text{ (in minutes)} = \frac{6433.33}{60} \approx 107.22 \text{ minutes} Since 107.22 minutes107.22 \text{ minutes} is closest to 110 minutes110 \text{ minutes} among the given options, 110 minutes110 \text{ minutes} is the appropriate answer.

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