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Which of the following elements does not...

Which of the following elements does not show positive oxidation state? Oxygen, sulphur, fluorine, chlorine.

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Since fluorine is most electronegative element, hence it does not show positive oxidation state.
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ARIHANT PUBLICATION-GROUP 17 ELEMENTS : HALOGEN FAMILY-QUESTIONS FOR PRACTICE (Very Short Answer Type Questions)
  1. Define pseudohalogens with examples.

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  2. Which halogen does not exhibit the oxidation state of +1?

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  3. Which of the following elements does not show positive oxidation state...

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  4. Which hydracid of halogen has the highest bond energy?

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  5. Acidic character increases from HF to HI Account for this.

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  6. Concentrated hydrogen fluoride exists in the molecular formula of .......

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  7. Arrange the following in order of increasing size: Cl, Cl^+ , Cl^-

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  8. F(2) has lower bond dissociation enthalpy than Cl(2). Why?

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  9. Explain why halogens are strong oxidising agents.

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  10. SnCl(4) is more covalent than SnCl(2).

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  11. What is the oxidation number of oxygen in OF(2)?

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  12. Give two examples to show the anomalous behaviour of fluorine.

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  13. Why hydrofluoric acid is the weakest of all the halogen acids ?

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  14. Which acid is used to draw picture on glass?

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  15. What happens when fluorine is passed through conc. NaOH solution?

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  16. What happens when chlorine gas is passed through cold solution of NaOH...

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  17. Give the reason for bleaching action of Cl(2).

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  18. Name two poisonous gases which can be prepared from chlorine gas.

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  19. What is the role of MnO2 in the preparation of Cl2 from HCI?

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  20. Account for the following. Iron on reaction with HCl forms FeCl(2) and...

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