In early days, hydrochloric acid was done by heating a mixture of sodium chloride with iron sulface.

Câu hỏi :

In early days, hydrochloric acid was done by heating a mixture of sodium chloride with iron sulface.

A In early days

B done

C heating 

D with 

* Đáp án

B

* Hướng dẫn giải

Phương pháp giải:

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