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Why do we boil the leaf in alcohol when ...

Why do we boil the leaf in alcohol when we are testing it for starch ?

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To remove all the chlorophyll pigments and for decolouring the leaf
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Given below are the stpes to be followed for performing 'starch test' on a green leaf. (A) Boil the leaf in alcohol (B) Boil the leaf in water (C) Dip the leaf in iodine solution (D) Wash the leaf in water Which one of the following sequences should the students follow to get the correct result?

BHARATI BHAWAN (ENGLISH)-PRACTICALS -MCQs
  1. Why do we boil the leaf in alcohol when we are testing it for starch ?

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  2. What type of cells with you observe in an onion peel examined under a ...

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  3. On adding a drop of iodine solution to an onion peel ,

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  4. Why do we cover the onion peel placed on a glass slide with a coversli...

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  5. Which type of cells are there in the onion peel ?

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  6. An onion is a modified

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  7. When you observe the onion peel under the high magnification of the mi...

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  8. Why do we keep the onion peel on a drop of water ?

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  9. What kind of cells are the human cheek cells ?

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  10. Why is the flat end of a sterile toothpick used to scrape the inside s...

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  11. If the cheek cells are placed on a dirty slide, what do we observe und...

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  12. The oval dense structure present in the centre of a cheek cell is

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  13. The region between the nucleus and cell membrane in a cheek cell is oc...

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  14. Which of the following is not found in cheek cells ?

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  15. Which of the following features makes plant cells autotrophic ?

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  16. Compared to the onion peel cells, cheek cells are more irregular in sh...

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  17. Which of the following is an example of simple permanent tissue in pla...

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  18. Which of the following plant tissues generally have oval or spherical ...

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  19. Which of the following simple permanent tissues does not have closely ...

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  20. Intercellular spaces are usually found between

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  21. The main functions of parenchyma tissues are

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