Question

A student added acetic acid to test tube 1 2 3 and 4 and then introduced a burning candle near the mouth of each test tube with name the test tube near with the candle will be extinguished

Answer 1

plz complete ur question mate

I think u missed to tell what does the test tubes1,2,3,4 contain before adding acetic acid

please notice that which ever test tube will release carbon dioxide gas(CO②)
the burning candle will get extinguished on bringing it near to that tube