Question

Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11,7 and 9 respectively, which solution is :

a) neutral 

b) strongly alkaline 

c) strongly acidic 

d) weakly acidic 

e) weakly alkaline Arrange the pH in increasing order of hydrogen ion concentration.

Answer 1

Solution – pH Value 

A → 4 

B → 1 

C → 11 

D → 7 

E → 9 

a) Solution ‘D’ is neutral 

b) Solution ‘C’ is strongly alkaline

c) Solution ‘B’ is strongly acidic 

d) Solution ‘A’ is weakly acidic 

e) Solution ‘E1 is weakly alkaline 

∴ Increasing order of Hydrogen ion concentration : 

C < E < D < A < B