Propane in presence of \(\mathrm{O}_2\) gas undergoes complete combustion to produce \(\mathrm{CO}_2\) and \(\mathrm{H}_2 \mathrm{O}\). The required \(\mathrm{O}_2\) for this combustion reaction was produced by the electrolysis of water. For what duration of time had water been electrolysed by passing \(200 \mathrm{~A}\) current so that Oxygen gas produced could completely burn \(44 \mathrm{~g}\) of Propane?

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.