A piece of magnesium dropped into a test tube containing diute hydrochioric acd. why does the test tube becomes warm? A Hydrogen is produced. B The magnesium neutralises the acid. C the reaction is endothemic. D The reaction is exothermie
the as shld be D. it releases heat. for A it only apply when a lighted splint is extinguished with a 'pop' sound. B is not factual. only alkali/base can neutralise acid. C endothermic is take in
