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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?
There are a great number of yellow compounds. Sulfur, gold, alizarin yellow, and tartrazine are just four examples.
What functional group gives a positive test in the xanthoproteic test?
The xanthproteic test gives a positive result when proteins with amino acids carrying aromatic groups are present. Aromatic groups are functional groups consisting of a 6 hydrocarbons with alternating double and single bonds between carbon atoms forming rings.
What is the colour of the flame when sulphur burns in air?
blue
Why propene cation is more stable than propane cation?
Aromatic compounds are resonance stabilized. Hence if a compound is aromatic it is more stable. The main thing to note here is that AROMATICITY GIVES STABILITY TO A COMPOUND. Therefore cyclopropene is an aromatic compound and hence is more stable than propene.
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?
There are a great number of yellow compounds. Sulfur, gold, alizarin yellow, and tartrazine are just four examples.
What colour mixing gives orange?
Red and yellow
Which particle gives yellow colour to plants?
Xanthophill
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.
What are the colour mixed to make orange?
Red and yellow gives us orange!
Why beta Galactosidase produce yellow color?
beta galactosidase breaks onpg into galactose and ortho-nitrophenol which gives a yellow colour
What functional group gives a positive test in the xanthoproteic test?
The xanthproteic test gives a positive result when proteins with amino acids carrying aromatic groups are present. Aromatic groups are functional groups consisting of a 6 hydrocarbons with alternating double and single bonds between carbon atoms forming rings.
What gives spice pandan its aromatic scent?
Room temperature outgassing of aromatic oils and other volatiles
Does bleach have an affect on permanent ink?
Yes. It lightens the ink, and gives off a pale yellow colour.
Does sodium give off an orange flame?
sodium gives off an orange to yellow flame colour
What is the colour of the flame when sulphur burns in air?
blue
