【Haichuan Teahouse】I guess you won’t either
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Question: There are four substances, A, B, C, and D. A and B can be converted into each other; when B is heated, it turns into solid C. If B is left untreated for a long time, it becomes D, which has the smell of rotten eggs. What are A, B, C, and D respectively? A student replied: A is a chicken, B is an egg, C is a cooked egg, and D is a rotten egg.
According to the question, what are those elements?
Sulfurous acid, sulfur dioxide, sulfur, hydrogen sulfide – but it’s a bit far-fetched