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What is difference between chromophore and auxochrome?
Chromophores are responsible for giving dyes their color by absorbing certain wavelengths of visible light and transmitting or reflecting others.Auxochromes modify the ability of a chromophore to absorb light. They often result in the deepening and intensifying of the color of compounds
Is methylene blue a chromophore?
Nope - methylene blue is a stain. You need liquid indicator like phenolphthalein that responds to pH changes.
What is the mechanism involved in Liebermann- Burchard test?
When conc. sulfuric acid is added to cholesterol, a water molecule is removed from C3 of cholesterol molecule, and it is oxidised to form3,5-cholestadiene.This product is converted to a polymer containing a chromophore which results in the green colouration indicating a positive test.
What group is oxygen?
Oxygen is in group 16 or group 6A
What is -OH group?
The -OH group is called the hydroxyl group
What is an auxochrome?
An auxochrome is any atom or group which, when added to a chromophore, causes a bathochromic shift in its spectrum.
What effect does a chromophore have on benzene?
It might be that benzene, a non-polar hydrocarbon solvent, will have an effect on a chromophore. A chromophore is, generally speaking, the portion of a molecule that affects the way it absorbs and reflects light, thereby giving it color. Benzne, C6H6, might react with the chromophore to alter it and change the color of a substance, but the substance would have to be specified before any attempt was made to predict the affects of benzene on its color.
Which ion carries the chromophore in an acidic dye?
The negative ion
What symbol indicates the capital city of Nigeria?
what symbol indictaes the capital city of nigeria
What is difference between chromophore and auxochrome?
Chromophores are responsible for giving dyes their color by absorbing certain wavelengths of visible light and transmitting or reflecting others.Auxochromes modify the ability of a chromophore to absorb light. They often result in the deepening and intensifying of the color of compounds
What is the difference between chromophore and fluorophore?
1. chromophore is an isolated covalently bonded group which characteristically absorbs in the visible range of electromagnetic radiation. But fluorophore is any group capable of absorbing energy and emitting radiation with a longer wavelength. 2. Chromophores may have a overlapping ground singlet and excited singlet state but a fluorophore must have non overlapping S0 and S1 orbitals. 3. Chromophores can't emit energy but fluorophores can. 4. Chromophores are of 2 main types, extended π bond system and metal complex chromophore. Fluorophores are of 2 types, extrinsic and intrinsic. 5. Chromophores can't be quenched but fluorophores can. 6. Chromophores' absorption is not temperature dependent but fluorophores' fluorescing capacity is temperature dependent.
What is a clomophore?
A chromophore is part of a molecule. This part is what gives the molecule its color by absorbing and reflecting light.
Can colorimetry be used to test concentration of citric acid?
It can be if you can convert the citric acid to a chromophore, i.e., something that is colored. Otherwise, you cannot.
Is methylene blue a chromophore?
Nope - methylene blue is a stain. You need liquid indicator like phenolphthalein that responds to pH changes.
What is bleaching process?
An oxidizing bleach works by breaking the chemical bonds of a chromophore (part of a molecule that has color). This changes the molecule so that it either has no color or else reflects color outside the visible spectrum. A reducing bleach works by changing the double bonds of a chromophore into single bonds. This alters the optical properties of the molecule, making it colorless.
What is the process bleaching?
An oxidizing bleach works by breaking the chemical bonds of a chromophore (part of a molecule that has color). This changes the molecule so that it either has no color or else reflects color outside the visible spectrum. A reducing bleach works by changing the double bonds of a chromophore into single bonds. This alters the optical properties of the molecule, making it colorless.
What reacts to light to start the process of transduction?
Retinal reacts to light to start the process of transduction. Retinal is a polyene chromophore, and is sometimes referred to as retinaldehyde.
