Question

student as a Acetic Acid to test used 1 2 3 and 4 and then introduced a burning candle near the mouth of each test tube in case in which cases the candle will get extinguished​

Answer 1

In 2 test tube the burning candle will distinguish as CO2 is produced in it

Answer 2

when sodium carbonate is added to acetic acid then carbondioxide will be released.

CH3COOH + Na2CO3--------->-CH3COONa+CO2