Peeled potatoes were cut into two sizes of cubes –1 cm3(1 cm×1 cm×1 cm)
and 27 cm3(3 cm×3 cm×3 cm)
and weighed. Then, 27 of the 1 cm3
cubes were placed in one beaker of distilled water, and one 27 cm3
cube was placed in another beaker. One hour later the cubes were removed and their surfaces carefully dried. They were then reweighed. The conclusions drawn from the experiment are as follows:
(i) The 27 small cubes were used as they have the same total volume and surface area as the large cube.
(ii) The lower water potential of the potato compared to the surrounding solution results in the mass increase of the potato.
(iii) The difference in percentage increase in mass of the large and small cubes is due to the larger volume of the large cube as compared with one of the individual small cubes.
(iv) If the potatoes were left in the water long enough for the system to reach equilibrium the large cube would display percentage increase in mass equal to that of the small cubes.
Which of the following statement (s) is (are) correct?
- i, ii and iii
- ii only
- iii only
- ii and iv