

InterviewSolution
Saved Bookmarks
1. |
How would you test the presence of strach in leaves? |
Answer» <html><body><p><strong>Answer:</strong></p><p>The <a href="https://interviewquestions.tuteehub.com/tag/presence-25557" style="font-weight:bold;" target="_blank" title="Click to know more about PRESENCE">PRESENCE</a> of <a href="https://interviewquestions.tuteehub.com/tag/starch-1224650" style="font-weight:bold;" target="_blank" title="Click to know more about STARCH">STARCH</a> in leaves can be <a href="https://interviewquestions.tuteehub.com/tag/tested-665596" style="font-weight:bold;" target="_blank" title="Click to know more about TESTED">TESTED</a> by <a href="https://interviewquestions.tuteehub.com/tag/iodine-519155" style="font-weight:bold;" target="_blank" title="Click to know more about IODINE">IODINE</a> test. When we remove <a href="https://interviewquestions.tuteehub.com/tag/chlorophyll-915921" style="font-weight:bold;" target="_blank" title="Click to know more about CHLOROPHYLL">CHLOROPHYLL</a> from leaf by boiling it in alcohol and then put 2 drops of iodine solution, its colour change to blue indicates the presence of starch.</p><p>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 minutes (this removes most of its colour)</p></body></html> | |