A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut ;surface of one-pf the halves. What colour change,will be noticed?

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Q: 76 (SSC/NA)
A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut ;surface of one-pf the halves. What colour change,will be noticed?

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.