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Q:- 4 Do as directed. (09)(1) How would you check the presence of starch in leaves?(2) Nehabhabhi takes two types of fiber, natural and synthetic. She does not knowwhich one is natural fiber and which is synthetic fiber. Which activity you will suggestto identify the fibers?(3) You are given three solutions A, B and C acid, base and neutral respectively. It isnot possible to identify them just by looking how will you identify the type of solution |
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Answer» Answer: Iodine solution is used to test leaves for the presence of starch. You NEED to: heat a plant leaf in boiling WATER for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minute 2.burn small price of fibre and identify the fibre 3.The given blue LITMUS paper is DIPPED in the given solutions. The solution which turns blue litmus RED is acidic solution. Now Tear this blue litmus turned red into 2 halves. Now, the solution which turns it blue again is the acidic solution and the one which does not affect it is distilled water. |
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