Which element is common to all acids?

31 What happens when carbon dioxide gas is passed through lime water:

(i) for a short time?

(ii) for a considerable time?

Write equations of the reactions involved.

32 With the help of labeled diagrams, describes an activity to show that acids produce ions only in aqueous solutions. 33 Compounds such as alcohol and glucose also contain hydrogen but are not categorized as acids. Describe an activity to prove it. 34 10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be: