The aqueous solutions of glucose and starch do not show acidic properties but that of sulphuric acid and acetic acid do. Why? 

Are ${\mathrm{H}}^{+}$ ions present in basic solutions? If yes, then why is the solution basic? 

You have two solutions "$\mathrm{A}$" and "$\mathrm{B}$" in water. The pH value of solution "$\mathrm{A}$" is $6$ and that of "$\mathrm{B}$" is $8$. Which solution will have a higher concentration of hydrogen ions? Which one of the solutions is acidic and which is basic? 

When Julie tested solutions $"\mathrm{A}", "\mathrm{B}", "\mathrm{C}", "\mathrm{D}"$ and $"\mathrm{E}"$" using a universal indicator, she got $\mathrm{pH}$ values of $9,7,1,13$ and $6$ respectively. On this basis can you tell which solution- 

(a) Is a weak acid 

(b) Is a weak base 

(c) Is a strong acid 

(d) Is a strong base 

(e) Is neutral.
 

Identify the acidic and basic radicals in each of the given salts: 

${\mathrm{NH}}_4\mathrm{Cl}, {\mathrm{KNO}}_3, ({\mathrm{NH}}_4{)}_2{\mathrm{CO}}_3, {\mathrm{CuSO}}_{4 }$.

What will be the nature of an aqueous solution of potassium chloride? Explain. 

How does excess carbon dioxide, sulphur dioxide and oxides of nitrogen in the atmosphere effect life?