railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Chemistry

Which of the following solutions helps in identifying the presence of starch (carbohydrates) in a food item?

1
Diluted Iodine solution
2
Copper sulphate solution
3
Solution of caustic soda
4
Diluted solution of potasium permanganate
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