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How does H(2)O(2) behave as a bleaching ...

How does `H_(2)O_(2)` behave as a bleaching agent?

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`H_(2)O_(2)` or hydrogen peroxide acts as a strong oxidizing agent both in acidic and basic media.
When added to a cloth, it breaks the chemical bonds of the chromophores (colour producing agents). Hence, the visible light is not absorbed and the cloth gets whitened.
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(a) How does H_(2)O behave as a bleaching agent? (b) What causes temporary and permanent hardness of water?

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In which of the following reactions does H_(2)O_(2) acts as a resucing agents ?

Assertion : H_(2)O_(2) is used as a bleaching agent for delicate materials like silk, wool ets. Reason : The bleaching action of H_(2)O_(2) is due to reduction.

Hydrogen peroxide is a powerful oxidising agent, both in the acidic and alkaline medium. In acidic medium: H_(2)O_(2)+2H^(o+)+2e^(ɵ)to2H_(2)O In alkaline medium: H_(2)O_(2)+2e^(ɵ)to2overset(Theta)(O)H Hydrogen peroxide acts as a reducing agent towards powerful oxidising agents. In acidic medium: H_(2)O_(2)to2H^(o+)+O_(2)+2e^(ɵ) In alkaline medium, however, its reducing nature is more effective. H_(2)O_(2)to2H^(o+)+O_(2)+2e^(ɵ) H_2O_2 behaves as a bleaching agent due to

NCERT-HYDROGEN-EXERCISE
  1. Compare the stuctures of H(2)O and H(2)O(2).

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  2. What do you understand by the term 'auto-protolysis' of water? What is...

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  3. Consider the reacton of water with F(2) and suggest, in terms of oxida...

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  4. Complete the following chemical reactions. (i) PbS(s)+H(2)O(2)(aq) t...

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  5. Describe the structure of the common form of ice.

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  6. What causes the temporary and permanent hardness of water ?

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  7. Discuss the principle and method of softening of hard water by synthet...

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  8. Write chemical reactions to show the amphoteric nature of water.

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  9. Write chemical reactions to justifty that hydrogen peroxide can functi...

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  10. What is meant by 'demineralised water' and how it can be obtained?

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  11. Is demineralised or distilled water useful for drinking purpose? If no...

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  12. Describe the usefulness of water in bioshphere and biological systems.

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  13. What properties of water make it useful as a solvent? What types of co...

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  14. Knowing the properties of H(2)O and D(2)O, do you think that D(2)O can...

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  15. What is the difference between hydrolysis and hydration?

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  16. How can saline hydrides remove traces of water from organic compouds?

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  17. What do you expect the nature of hydrides is, it formed by elements of...

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  18. Do you expect different products in solution when aluminium (III) chlo...

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  19. How does H(2)O(2) behave as a bleaching agent?

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  20. What do you understand by the terms: (i) hydrogen economy (ii) hydroge...

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