Question
When you add a few drops of acetic acid to a testube containing sodium bicarbonate powder, which one of the following is your observation?
(a) No reaction takes place.
(b) A colourless gas with pungent smell is released with brisk effervescence.
(c) A brown coloured gas is released with brisk effervescence.
(d) Formation of bubbles of a colourless and odourless gas.