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Give the oxidation state of halogen in t...

Give the oxidation state of halogen in the following.
(a) `OF_(2)" (b)" O_(2)F_(2)" (c)" Cl_(2)O_(3)" (d)" I_(2)O_(4)`

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(a) `OF_(2)`
`+2+2(x)=0`
`+2=-2x`
`2x=-2`
`x=-1`
(b) `O_(2)F_(2)`
`2(+1)+2x=0`
`2x=-2`
`x=-1`
(c ) `Cl_(2)O_(3)`
`2(x)+3(-2)=0`
`2x=+6`
`x=+3`
(d ) `I_(2)O_(4)`
`2(x)+4(-2)=0`
`2x=+8`
`x=+4`
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FULL MARKS-P - BLOCK ELEMENTS - II-TEXTBOOK EVALUATION (II. Answer the following questions:)
  1. Chalcogens belongs to p-block. Give reason.

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  2. Explain why fluorine always exhibit an oxidation state of -1 ?

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  3. Give the oxidation state of halogen in the following. (a) OF(2)" ...

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  4. What are interhalogen compounds ? Give examples .

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  5. Why fluorine is more reactive than other halogens?

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  6. Give the uses of helium .

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  7. What is the hybridisation of iodine in IF(7) ? Give its structure .

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  8. Give the balanced equation for the reaction between chlorine with cold...

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  9. How will you prepare chlorine in the laboratory ?

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  10. Give the uses of sulphuric acid.

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  11. Give a reason to support that sulphuric acid is a dehydrating agent.

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  12. Write the reason for the anamolous behaviour of nitrogen .

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  13. Write the molecular formula and structural formula for the following m...

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  14. Give the uses of argon.

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  15. Write the valence shell electronic configuration of group-15 elements.

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  16. Give the equations to illustrate the chemical behaviour of phosphine .

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  17. Give a reaction between nitric acid and a basic oxide.

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  18. What happens when PCl(5) is heated ?

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  19. Suggest a reason why HF is a weak acid, wheres binary acids of the all...

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  20. Deduce the oxidation number of oxygen in hypofluorous acid -HOF.

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