Question

On adding acetic acid to sodium hydrogen carbonate in a test tube, a student observes

(A) no reaction

(B) a colourless gas with pungent smell

(C) bubbles of a colourless and odourless gas

(D) a strong smell of vinegar

Answer 1

Acetic acid reacts with sodium hydrogen carbonate to form the salt sodium acetate and water with the evolution of CO₂. This CO₂ is a colourless, odourless gas. Thus, the student will observe bubbles of colourless and odourless gas.

The Correct Answer is C