Chapter 2

NCERT
Class 10
Science
Solutions
9. 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 :

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:

(a) – D, (b) –C, (c) – B, (d) – A, (e) – E

Increasing order of hydrogen-ion concentration :

C < E < D < A < B

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