Question

In the experiment of determining the percentage of water absorbed by raisins, two students Somya and Zahira used the following formula respectively :
(i)(w1-w2)/w1 X (ii)(w2-w1)/w1
(i) Which student used wrong formula ?
(ii) What are w1 and w2 in the correct formula ?

CBSE Class IX Science SA 1 ( 2 marks)

Answer 1

 (i) Student (I)
 (ii) w2 is the mass of raisin after soaking and w1 is the mass of dried raisin.