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bread gives black-blue or deep blue color with iodine because starch is present in bread.
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∙ 12y ago
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What is the result of lugol's test in glycogen?
it should give dark brown color with high concentration of glyogen
What color gives if starch reacts with iodine?
When iodine reacts with starch, the solution will turn a brownish colour.
When iodine is heated?
when iodine is heated it gives voilet vapours
What element is is shiny black solid but gives off a purple vapor when heated?
Iodine on heating gives off dense purple vapor.
What chemical test is performed to indicate the completion of the hydrolysis of starch by acid?
If using acid-catalyzed hydrolysis of starch you can tell the hydrolysis is complete with the solution no longer gives a bluish/purple color with iodine solution. The color should be colorless.
Why glycogen gives red colour with iodine?
When Iodine is added to amylose, the helical shape of the unbranched polysaccharide traps Iodine molecules, producing a deep blue-black complex. Amylopectin, cellulose, and Glycogen react with iodine to give red to brown colors. Glycogen produces a reddish-purple color.
Who gives the bread in communion?
The priest gives the bread during communion
How can you tell when hydrolysis of starch is complete?
If using acid-catalyzed hydrolysis of starch you can tell the hydrolysis is complete with the solution no longer gives a bluish/purple color with iodine solution. The color should be colorless.
How man protons in Iodine?
An atom's atomic number gives its number of protons. Iodine's atomic number is 53. Thus, iodine has 53 protons.
What is shiny black solid but gives off a purple vapor when heated.?
You think to iodine.
This shiny nonmetal gives off purple vapors?
Iodine
What is a solid nonmetal that gives purple vapor on heating?
iodine
