Question

The precautions while testing a leaf for starch

Answer 1

Answer:

The answer for your question is given below.

Explanation:

First we will heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minutes (this removes most of its colour) wash with water and spread onto a white tile. add iodine solution from a dropper. If it turns blue black it shows that it contains starch.

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Answer 2

Answer:

The precautions taken should be:

• When you are boiling the leaf, stay away.
• Heat the Spirit in a test tube containing water.
• Take care while heating Spirit.

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This is the correct answer.