NCERT Exemplar Solutions
Class 10 - Science - CHAPTER 2: Acids, Bases and Salts - Multiple Choice Questions
Question 26

Question.  26

Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained?

(a)

Red

(b)

Yellow

(c)

Yellowish green

(d)

Blue

Detailed Answer with Explanation:

Steps: Equal volumes of equal concentration HCl and NaOH neutralise to give a neutral solution (pH ≈ 7). On the pH colour chart, pH 7 corresponds to greenish (yellowish-green). Hence yellowish green.

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