Q: 76 (SSC/NA)
question_subject:
Science
question_exam:
SSC
stats:
0,2,3,2,1,2,0
keywords:
{'potato tuber': [1, 0, 0, 0], 'colour change': [2, 0, 0, 0], 'iodine solution': [1, 0, 0, 0], 'brown': [1, 0, 0, 1], 'green': [4, 0, 4, 6], 'bltie': [1, 0, 0, 0], 'cut': [2, 0, 0, 0], 'halves': [1, 0, 1, 0], 'pf': [1, 0, 0, 0], 'few drops': [1, 0, 0, 0]}
When iodine solution is applied to the cut surface of a potato tuber, a color change will be noticed. Option 1 states that the color will change from brown to blue-black. This is the correct answer. Iodine reacts with starch, which is present in the potato tuber. In the presence of starch, iodine turns blue-black. Therefore, when iodine solution is applied to the cut surface of the potato tuber, the brown color of the potato will change to blue-black, indicating the presence of starch. Options 2, 3, and 4 are incorrect as they do not correctly describe the color change that occurs with iodine and starch.