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Why are halogens coloured ?...

Why are halogens coloured ?

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Why halogens are coloured gases and they are very reactive ? Comment on it.

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MODERN PUBLICATION-p-BLOCK ELEMENTS-EXERCISE
  1. Draw the structure of XeF4 . What is the state of hybridisation of Xe ...

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  2. Why does bond angle decreases in the hydrides of nitrogen family while...

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  3. Why are halogens coloured ?

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  4. How will ozone oxidise the following : Lead sulphide to lead sulphate

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  5. How will ozone oxidise the following : Potassium nitrite to potassium ...

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  6. What is the oxidation number of central atom Mn3 (CO)12

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  7. What is tailing of mercury ?

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  8. All the five bonds in PCl5 are not equivalent justify.

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  9. H3PO2 is monoprotic acid. Explain.

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  10. What is the oxidation number of central atom Na3[Cr (OH)2 F ]

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  11. How will ozone oxidise the following : Copper sulphide to copper sulph...

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  12. How will ozone oxidise the following : Potassium manganate to potassiu...

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  13. Explain why moist chlorine can bleach dry coloured articles but dry ch...

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  14. Write down the structure of SO2 and state with reason whether it is po...

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  15. Explain why phosphorus forms PCl5 whereas nitrogen does not form NCl5 ...

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  16. What is the oxidation number of central atom [Mn (H2O)6]^(+2)

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  17. Why is HNO2 not stable.

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  18. Complete the following reaction : NaOH (hot, conc.) + Cl2(g) rarr

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  19. Complete the following reaction: P4+SO2Cl2 rarr

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  20. Complete the following reaction : NH3(excess) + Cl2 rarr

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