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Voilet colour of iodine vapour is due to?
The violet color of iodine vapor is due to the interaction between the iodine molecules, which absorb light in the visible spectrum, resulting in the perception of the colored light. This is known as selective absorption of light.
Iodine turns what colour when its positive for starch?
Iodine turns blue-black when it tests positive for starch due to the formation of a starch-iodine complex.
Does iodine turn into vapour on heating?
Yes, iodine does sublimate directly from solid to vapor form when heated without turning into a liquid state. This is due to its relatively low melting point of 113.7°C.
Does glycogen and amylopectin have a helical structure like amylose and if yes why is it that glycogen and amylopectin form red-violet colouration with potassium iodide?
Yes, they are helical. The change in colouration is due to iodine being trapped in the helix. Difference in colour is due to the different wavelength of light being absorbed when iodine form bonds with the glucose molecules in the helix.
What happens when you add iodine with water?
When iodine is added to water, it forms a solution where the iodine molecules dissociate, producing a characteristic brown color. This color is due to the interaction of iodine molecules with water molecules.
Voilet colour of iodine vapour is due to?
The violet color of iodine vapor is due to the interaction between the iodine molecules, which absorb light in the visible spectrum, resulting in the perception of the colored light. This is known as selective absorption of light.
Which element name is derived from the greek word violet?
The element name derived from the Greek word for violet is Iodine. It comes from the Greek word "ιώδης" (iodes), meaning violet-colored, due to the violet vapor it produces when heated.
Why is iodine called iodine?
Iodine is named after the Greek word "iodes," meaning "violet-colored," due to the deep purple color it exhibits in its vapor state. This color led to the element being named iodine by French chemist Joseph Louis Gay-Lussac in 1814.
Iodine turns what colour when its positive for starch?
Iodine turns blue-black when it tests positive for starch due to the formation of a starch-iodine complex.
What happens when you burn an iodine crystal?
when iodine crysatals are heated, they turn from a solid into a gas (vapour). They start a black colour and as they gradually turn into a gas, they turn to a purple colour. At the end, there are no crystals left.
Does iodine turn into vapour on heating?
Yes, iodine does sublimate directly from solid to vapor form when heated without turning into a liquid state. This is due to its relatively low melting point of 113.7°C.
What do the particles look like in gas?
At the molecular level iodine gas contains I2 molecules, which if you could see them ( they are too small to be seen using light) and you were able to see the electron density then they would appear as small dumbells. When iodine sublimes the colour of the "gas" is violet this due to the aborption of visible light by the I2 molecule.
What is the colour for a plant cell's starch grains?
The colour for a plant cell's starch grains is typically blue or black when stained with iodine solution. This is due to the formation of a complex between iodine and starch, which results in the characteristic colour change.
If iodine step was amitted how would gram negative cells appear?
Iodine work as modrant to crystal violet if the iodine step will be emitted then the crystal violet will not be able to show its effect and all cells will appear pink when counter stain with saffranin
Does glycogen and amylopectin have a helical structure like amylose and if yes why is it that glycogen and amylopectin form red-violet colouration with potassium iodide?
Yes, they are helical. The change in colouration is due to iodine being trapped in the helix. Difference in colour is due to the different wavelength of light being absorbed when iodine form bonds with the glucose molecules in the helix.
What happens when you add iodine with water?
When iodine is added to water, it forms a solution where the iodine molecules dissociate, producing a characteristic brown color. This color is due to the interaction of iodine molecules with water molecules.
Why does glycogen gives red colour with iodine?
Glycogen gives a red color with iodine due to the formation of a complex between iodine and the helical structure of glycogen. This complex results in a shift in the absorption spectrum of iodine, leading to the red color observed.
