question_answer 77)

  4 L of 0.02 M aqueous solution of NaCI was diluted by adding 1 L of    water The molality of the resultant solution is??      (a)0.004     (b)0.008    (c)0.012       (d)0.016

Answer:

                  (d) Given M1=0.02M, V1=4L, M2=, V2=4L + 1L =5L                 As we know,