The bleaching action of Chlorine is permanent because it involves the process of oxidation. Chlorine reacts with water to produce nascent oxygen. Then the oxygen combines with the colours material and makes it colourless. It is a powerful oxidising agent.
Why Cl2 bleaches a substance permanently BUT SO 2 does it temporarily?
Give reason. Cl2 bleaches by oxidation, while SO2 bleaches by reduction. When Chlorine react with water it form nascent oxygen which act as oxidising agent. Hence product bleached by SO2 is reoxidised by air to its original form.
Which has permanent bleaching action?
Chlorine is a strong oxidising and bleaching agent because of the nascent oxygen. Therefore, bleaching of chlorine is permanent.
Why the bleaching action of chlorine is permanent but SO2 is temporary?
The bleaching action of SO2 is temporary because it involves the process of reduction. SO2 removes oxygen from the coloured substance to make it colourless.
How does the bleaching action of Cl2 differs from SO2?
The key difference between bleaching action of SO2 and Cl2 is that bleaching action of SO2 proceeds through a reduction reaction and is a temporary bleaching process whereas bleaching action of Cl2 proceeds through an oxidation reaction and is a permanent bleaching process.
What is the bleaching action of chlorine?
Chlorine bleaches by the process of oxidation as it needs moisture for its bleaching action. When chlorine reacts with water to form hydrochloric acid, which is unstable and quickly dissociates to form nascent oxygen. Nascent oxygen is a more powerful oxidising agent.
What is cause of bleaching action of chlorine water explain it with chemical equation?
Chlorine on reaction with water releases nascent Oxygen. Cl2 + H2O → HCl + HClO HClO → HCl + (O) This nascent Oxygen reacts with coloured matter to make it colourless. Coloured matter + (O) → Colourless matter + H2O Thus Chlorine has its bleaching action only inpresence of water.
Which of the following is permanent bleaching agent?
The correct answer is Chlorine. Permanent Bleaching is caused by Chlorine.
What is the reason of bleaching action of SO2?
Bleaching property of chlorine is due to oxidation whereas the bleaching property of sulphur dioxide is due to reduction. Chlorine reacts with water and produces nascent oxygen. The formed nascent oxygen reacts with color substances and makes them colorless.
Why is ozone a strong bleaching agent?
Ozone acts as the strong bleaching agent. Ozone has the capability to provide oxygen as well as the nascent oxygen. This production of nascent oxygen actually causes the bleaching action as it bleaches the color on a permanent basis.
Why is bleach an oxidizing agent?
Chlorine bleaches are oxidizing agents; when chlorine reacts with water, it produces hydrochloric acid and atomic oxygen. The oxygen reacts easily with the chromophores to remove electrons from the molecule, chemically changing the structure of the molecule and the physical properties that cause the color are changed.
Is Cl2 a bleaching agent?
It is a powerful bleaching agent. Bleaching action is due to oxidation. Coloured substance Colourless substance + O → It bleaches organic matter in the presence of moisture. Bleaching effect of chlorine is permanent.
How does Cl2 show bleaching behavior?
- Chlorine bleaches by the process of oxidation. It needs moisture for its bleaching action.Chlorine reacts with water to form hydrochloric and hypochlorous acids.
- Hypochlorous acid is unstable, and it easily dissociates to form nascent oxygen.
- Nascent oxygen is a more powerful oxidising agent.
What are uses of chlorine?
Chlorine has a variety of uses. It is used to disinfect water and is part of the sanitation process for sewage and industrial waste. During the production of paper and cloth, chlorine is used as a bleaching agent. It is also used in cleaning products, including household bleach which is chlorine dissolved in water.
Which is not a permanent bleaching?
Which is not used for permanent bleaching ? Bleaching action of chlorine is permanent – Justify this statement and also give the uses of chlorine. Bleaching action of SO2 is permanent/ temporary.
Which oxide of chlorine has bleaching action?
Chlorine reacts with water to form hydrochloric and hypochlorous acids. Hypochlorous acid is unstable and it easily dissociates to form nascent oxygen. Bleaching action done by this way is permanent because other compounds like sulphur dioxide bleaches by reduction which is considered to be mild.
How does h2o2 act as bleaching agent?
The nascent oxygen combines with colouring matter which in turn gets oxidized. Thus, the bleaching action of hydrogen peroxide is due to the oxidation of colouring matter by nascent oxygen. It is used for the bleaching of silk, ivory, wool or feather.
Why is ozone known as dry bleach?
Ozone is used as a dry bleaching agent. Ozone on decomposition gives nascent oxygen So it acts as a bleaching agent. Nascent oxygen is a single molecule of oxygen that is not bonded to any other molecule.
How is ozone prepared why ozone acts as powerful oxidizing agent?
Answer: O3 being endothermic compound readily decomposes on heating to give dioxygen nascent oxygen. O3 O2 + O (nascent oxygen) Since nascent oxygen is very reactive, therefore, O3 acts as a powerful oxidising agent.
Which of the following reasons explain the oxidising nature of ozone?
Ozone is not a very stable compound under normal conditions and decomposes readily on heating to give a molecule of oxygen and nascent oxygen. Nascent oxygen, being a free radical, is very reactive. Therefore, ozone acts as a powerful oxidising agent.
Is chlorine an oxidizing or reducing agent?
Chlorine is an oxidising agent since it needs one electron in its valence shell to occupy the one empty space. Chlorine is capable of taking electrons from both iodide and bromide ions. Those electrons will not be reclaimed by bromine and iodine from the produced chloride ions.
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