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Aromatic compounds contain a delocalized pi electron system that can absorb light in the visible region, leading to the appearance of color. The specific wavelengths of light absorbed by the pi electrons correspond to the yellow part of the spectrum, resulting in the yellow color observed in some aromatic compounds.
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What functional group gives a positive test in the xanthoproteic test?
The phenolic functional group gives a positive test in the xanthoproteic test. This test involves the reaction of phenolic compounds with concentrated nitric acid, resulting in a yellow coloration due to the formation of nitrophenols.
Why many aromatic hydrocarbons do not have any odor while compounds that have a pleasant odor do not have aromatic rings?
when aromatic compounds were first discovered they were called aromatic due to their plesant odours but as you have rightly pointed out compouns such as diatomic hydrogen have pleasant smells its is becuase of this that the meaning of aromaticity changed as aromatic compounds are saturated stable compounds its the notion of delocalised electrons that defines a aromatic compound now as this enhances the stabilty of the compound so chemically aromatic and aromatic are not particularly synoynymous any more in fact chemical aromacity has very little to do with aromacity and ewhat it does to the oliafactory centres that gives us the perception of smell
What chemical compounds are yellow when dissolved in water?
Some chemical compounds that are yellow when dissolved in water include potassium chromate (K2CrO4), potassium dichromate (K2Cr2O7), and picric acid (C6H3N3O7). These compounds exhibit yellow color due to their specific molecular structures and interactions with water molecules.
What colour flame test do sodium sulphate and potassium chloride give?
well , the colour of potassium chloride is a lilac colour :) hope this helps
Why Should phenylalanine give a yellow Color with concentrated nitric acid?
Phenylalanine gives a yellow color with concentrated nitric acid due to the formation of a nitro derivative. Nitric acid reacts with the aromatic ring of phenylalanine, leading to the formation of a yellow compound.
What colour mixing gives orange?
Red and yellow
What functional group gives a positive test in the xanthoproteic test?
The phenolic functional group gives a positive test in the xanthoproteic test. This test involves the reaction of phenolic compounds with concentrated nitric acid, resulting in a yellow coloration due to the formation of nitrophenols.
Does sodium give off an orange flame?
sodium gives off an orange to yellow flame colour
Why many aromatic hydrocarbons do not have any odor while compounds that have a pleasant odor do not have aromatic rings?
when aromatic compounds were first discovered they were called aromatic due to their plesant odours but as you have rightly pointed out compouns such as diatomic hydrogen have pleasant smells its is becuase of this that the meaning of aromaticity changed as aromatic compounds are saturated stable compounds its the notion of delocalised electrons that defines a aromatic compound now as this enhances the stabilty of the compound so chemically aromatic and aromatic are not particularly synoynymous any more in fact chemical aromacity has very little to do with aromacity and ewhat it does to the oliafactory centres that gives us the perception of smell
What chemical compounds are yellow when dissolved in water?
Some chemical compounds that are yellow when dissolved in water include potassium chromate (K2CrO4), potassium dichromate (K2Cr2O7), and picric acid (C6H3N3O7). These compounds exhibit yellow color due to their specific molecular structures and interactions with water molecules.
Which confirmatory test is for sodium?
Its Flame Test:it gives golden yellow colour to non luminous flame which is not seen through a blue glass.
What are the colour mixed to make orange?
Red and yellow gives us orange!
Why is yellow cheese yellow?
The orange color of some cheese comes from compounds such as beta carotene (yellow) or spices such as annatto (orange). Most processed cheeses just add coloring.
Does adrenaline give a positive result to xanthoproteic test?
Yes, adrenaline gives a positive result in the xanthoproteic test. This test is used to detect the presence of aromatic amino acids, such as tyrosine and tryptophan, by reacting them with concentrated nitric acid, which produces a yellow coloration. Since adrenaline contains a phenolic structure derived from tyrosine, it reacts positively in this test, indicating the presence of these aromatic compounds.
Does bleach have an affect on permanent ink?
Yes. It lightens the ink, and gives off a pale yellow colour.
What colour flame test do sodium sulphate and potassium chloride give?
well , the colour of potassium chloride is a lilac colour :) hope this helps
Is there riboflavin in milk?
No. Carotene is the compound in grasses that gives both the yellow colour in the milk, and the yellowish colour in the fat of meat from grass-fed animals.
