Question:
$SO_2$ acts as temporary bleaching agent but $Cl_2$ acts as permanent bleaching agent. Why ?
$SO_2$ acts as temporary bleaching agent but $Cl_2$ acts as permanent bleaching agent. Why ?
Updated On: Aug 18, 2023
- $Cl_2$ bleaches due to reduction but $SO_2$ due to oxidation
- $Cl_2$ bleaches due to oxidation but $SO_2$ due to reduction
- Both (A) and (B)
- None of these
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The Correct Option is B
Solution and Explanation
Chlorine bleaches by oxidation while $SO_2$ by reduction.
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Concepts Used:
Chlorine
A chemical element with the symbol Cl and the atomic number 17 is ‘Chlorine’. It is the second-lightest of the halogens that appears between fluorine and bromine in the periodic table and its properties are median between them. At room temperature, it is a yellow-green gas. Also, it has two stable isotopes, 35Cl and 37Cl. These are the only two natural isotopes occurring in quantity, with 35Cl making up 76% of natural chlorine and 37Cl making up the remaining 24%.
Applications of Chlorine:
- In water purification, disinfectants, bleach, and mustard gas, chlorine is an important chemical.
- Also, it is widely used in the manufacture of many products and items directly or indirectly, i.e. in paper product production, antiseptic, dyestuffs, food, plastics, medicines, insecticides, paints, petroleum products, textiles, solvents, and many other consumer products.
- It is also used to kill bacteria or to disinfect drinking water supplies.
- Chlorine is mixed up in beaching wood pulp for papermaking, also bleach is used industrially to remove ink from recycled paper.
- Chlorine often set forth many desired properties in an organic compound when it is substituted for hydrogen (synthetic rubber), so it is widely used in organic chemistry, in the production of chlorates, carbon tetrachloride, chloroform, and the bromine extraction.