question_answer 44)

    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 of NCERT Book (Science Class X) on page26).                 (a) Red                                 (b) Yellow                            (c) Yellowish green          (d) Blue                

Answer:

  (c) Because the resulting solution is obtained as a result of neutralization reaction. The colour of the neutral solution (with pH=7) obtained is yellowish green.