The speech standard of the Ming and Qing empires was called Mandarin language by European missionaries, translating the Chinese name Guanhua (the language of the officials) for this speech standard, which was current already in the Ming Dynasty.
Producer gas is made by blowing air through an incandescent fuel bed (commonly coke or coal) in a gas producer. The reaction of fuel with insufficient air for total combustion produces carbon monoxide (CO); this reaction is exothermic and self-sustaining.
Zn + 2HCl H 2 + ZnCl 2 B. What gas was produced by the reaction of zinc and hydrochloric acid? How did this gas behave in the presence of fire? The gas produced by the reaction of zinc and hydrochloric acid was hydrogen. In the presence of fire Hydrogen explodes with a popping sound.