Question 26 - MCQs from NCERT Exemplar - Chapter 2 Class 10 - Acids, Bases and Salts

Last updated at Dec. 16, 2024 by

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? (You may use colour guide given in Figure 2.2 

Fig 2.2.jpg

(A) Red

(B) Yellow

(C) Yellowish green

(D) Blue

 

Answer

Here, 

  • HCl is a strong acid and NaOH is a strong base . So, when equal volumes of both are mixed, they undergo neutralization reaction to form salt and water.
  • Therefore, the pH of the resulting solution is near neutrality i.e. 7

Acidic, Basic and Neutral Salts-01.jpg

As is clear from the figure given above, the color corresponding to pH 7 is yellowish green

 

So, the correct option is (c) yellowish green

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