Question

Choose the most suitable passive voice conversion of the given sentence:
Our Chemistry teacher told us that chlorine smells pungent.

• A. Our Chemistry teacher told us that chlorine is pungent when smelt.
• B. Chlorine is pungent, was told by our Chemistry teacher.
• C. Our Chemistry teacher has told that pungent smells chlorine.
• D. None of these

Answer 1

The correct option is A Our Chemistry teacher told us that chlorine is pungent when smelt.

We use 'when' as a subordinating conjunction to introduce adverbial clauses of time. It means during the time that and indicates that something is or was happening when something else occurred. Since chlorine is at the receiving end of the action of smelling, when is used to indicate the time of the action. We use both when and while as subordinating conjunctions to introduce adverbial clauses of time. Hence, Option A is correct. The rest of the options do not follow the required structure, hence incorrect.