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What can be used to remove iodine stain ...

What can be used to remove iodine stain from clothes and why?

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Sodium thiosulphate or hypo reacts with iodine `(I_(2))` to form colourless sodium tetrathionate and sodium iodide `(2Na_(2)S_(2)O_(3) + I_(2) to Na_(2)S_(6)O_(6) + 2Nal)` ,
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CHHAYA PUBLICATION-P-BLOCK ELEMENTS-SHORT ANSWER-TYPE QUESTIONS
  1. Liquid ammonia is widely used as a refrigerant-why?

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  2. H(3)PO(3) acts as a reducing agent but H(3)PO(4) does not why?

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  3. NCl(3) undergoes ready hydrolysis but NF(3) does not why?

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  4. Give an example of a disproportionation reaction of H(3)PO(3).

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  5. What is Holme's signal?

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  6. At room temperature, H(2)O is a liquid but H(2)S is a gas why?

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  7. Explain why ozone is a strong oxidising agent.

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  8. Na(2)O(2) is called peroxide but PbO(2) is called dioxide why ?

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  9. Rubber cork is not used in any experiment involving - why ?

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  10. How can dilute H(2)SO(4) be prepared from concentrated H(2)SO(4) ?

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  11. State what happens when cone. H(2)SO(4) is added to cane sugar.

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  12. OF(6) does not exist-why?

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  13. Identify X in the reaction: Cl(2) + 2X^(-) to 2Cl^(-) + X(2) and expl...

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  14. Arrange HCIO, HCIO(3), HCIO(4) and HCIO(4) in order of increasing oxi...

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  15. Iodine is libereated when Cu^(2+) reacts with KI but chlorine is not...

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  16. What can be used to remove iodine stain from clothes and why?

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  17. F is a non-metal but I exhibits some metallic property why?

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  18. lnterhalogen compounds are more reactive halogens-why?

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  19. The noble gases are almost chemically inert-why ?

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  20. Explain why xenon can be liquefied more easily helium.

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