Class 10
Solutions to CBSE Sample Paper - Science Class 10

The graph given below depicts a neutralization reaction (acid + alkali → salt + water). The pH of a solution changes as we add excess of acid to an alkali. 

Q5 - depicts a neutralization reaction - Teachoo.jpg

Which letter denotes the area of the graph where both acid and salt are present? 

(A) A 

(B) B 

(C) C 

(D) D


pH scale-Techoo.jpg

When both acid and salt are present, the pH of the solution becomes less than 7 .

From the graph, the pH is less than 7 at only part D

So, the correct answer is (D)

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo