The pH of a compound is found to be 9. The compound can be
CH3COOH.
HCl.
Na2CO3
NaOH.
The solution having pH values of 8, 9 and 10 are usually considered as weak bases. Sodium carbonate is a weak base.
Fresh milk has a pH of 6. On changing into curd, its pH becomes
The normal pH range for a healthy body is
Which of the following statements is correct about an aqueous solution of an acid and of a base ?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(iii) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
When an acid is dissolved in water, the concentration of hydrogen ions per unit volume
